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Microservices: Service-to-service communication
The following excerpt about microservice communication is from the new Microsoft eBook, Architecting Cloud-Native .NET Apps for Azure. The book is freely available for online reading and in a downloadable .PDF format at https://docs.microsoft.com/en-us/dotnet/architecture/cloud-native/ Microservice Guidance When constructing a cloud-native application, you'll want to be sensitive to how back-end services communicate with each other. Ideally, the less inter-service communication, the better. However, avoidance isn't always possible as back-end services often rely on one another to complete an operation. There are several widely accepted approaches to implementing cross-service communication. The type of communication interaction will often determine the best approach. Consider the following interaction types:
Query – when a calling microservice requires a response from a called microservice, such as, "Hey, give me the buyer information for a given customer Id."
Command – when the calling microservice needs another microservice to execute an action but doesn't require a response, such as, "Hey, just ship this order."
Event – when a microservice, called the publisher, raises an event that state has changed or an action has occurred. Other microservices, called subscribers, who are interested, can react to the event appropriately. The publisher and the subscribers aren't aware of each other.
Microservice systems typically use a combination of these interaction types when executing operations that require cross-service interaction. Let's take a close look at each and how you might implement them.
Many times, one microservice might need to query another, requiring an immediate response to complete an operation. A shopping basket microservice may need product information and a price to add an item to its basket. There are a number of approaches for implementing query operations.
One option for implementing this scenario is for the calling back-end microservice to make direct HTTP requests to the microservices it needs to query, shown in Figure 4-8. Figure 4-8. Direct HTTP communication While direct HTTP calls between microservices are relatively simple to implement, care should be taken to minimize this practice. To start, these calls are always synchronous and will block the operation until a result is returned or the request times outs. What were once self-contained, independent services, able to evolve independently and deploy frequently, now become coupled to each other. As coupling among microservices increase, their architectural benefits diminish. Executing an infrequent request that makes a single direct HTTP call to another microservice might be acceptable for some systems. However, high-volume calls that invoke direct HTTP calls to multiple microservices aren't advisable. They can increase latency and negatively impact the performance, scalability, and availability of your system. Even worse, a long series of direct HTTP communication can lead to deep and complex chains of synchronous microservices calls, shown in Figure 4-9: Figure 4-9. Chaining HTTP queries You can certainly imagine the risk in the design shown in the previous image. What happens if Step #3 fails? Or Step #8 fails? How do you recover? What if Step #6 is slow because the underlying service is busy? How do you continue? Even if all works correctly, think of the latency this call would incur, which is the sum of the latency of each step. The large degree of coupling in the previous image suggests the services weren't optimally modeled. It would behoove the team to revisit their design.
Materialized View pattern
A popular option for removing microservice coupling is the Materialized View pattern. With this pattern, a microservice stores its own local, denormalized copy of data that's owned by other services. Instead of the Shopping Basket microservice querying the Product Catalog and Pricing microservices, it maintains its own local copy of that data. This pattern eliminates unnecessary coupling and improves reliability and response time. The entire operation executes inside a single process. We explore this pattern and other data concerns in Chapter 5.
Service Aggregator Pattern
Another option for eliminating microservice-to-microservice coupling is an Aggregator microservice, shown in purple in Figure 4-10. Figure 4-10. Aggregator microservice The pattern isolates an operation that makes calls to multiple back-end microservices, centralizing its logic into a specialized microservice. The purple checkout aggregator microservice in the previous figure orchestrates the workflow for the Checkout operation. It includes calls to several back-end microservices in a sequenced order. Data from the workflow is aggregated and returned to the caller. While it still implements direct HTTP calls, the aggregator microservice reduces direct dependencies among back-end microservices.
Another approach for decoupling synchronous HTTP messages is a Request-Reply Pattern, which uses queuing communication. Communication using a queue is always a one-way channel, with a producer sending the message and consumer receiving it. With this pattern, both a request queue and response queue are implemented, shown in Figure 4-11. Figure 4-11. Request-reply pattern Here, the message producer creates a query-based message that contains a unique correlation ID and places it into a request queue. The consuming service dequeues the messages, processes it and places the response into the response queue with the same correlation ID. The producer service dequeues the message, matches it with the correlation ID and continues processing. We cover queues in detail in the next section.
Another type of communication interaction is a command. A microservice may need another microservice to perform an action. The Ordering microservice may need the Shipping microservice to create a shipment for an approved order. In Figure 4-12, one microservice, called a Producer, sends a message to another microservice, the Consumer, commanding it to do something. Figure 4-12. Command interaction with a queue Most often, the Producer doesn't require a response and can fire-and-forget the message. If a reply is needed, the Consumer sends a separate message back to Producer on another channel. A command message is best sent asynchronously with a message queue. supported by a lightweight message broker. In the previous diagram, note how a queue separates and decouples both services. A message queue is an intermediary construct through which a producer and consumer pass a message. Queues implement an asynchronous, point-to-point messaging pattern. The Producer knows where a command needs to be sent and routes appropriately. The queue guarantees that a message is processed by exactly one of the consumer instances that are reading from the channel. In this scenario, either the producer or consumer service can scale out without affecting the other. As well, technologies can be disparate on each side, meaning that we might have a Java microservice calling a Golang microservice. In chapter 1, we talked about backing services. Backing services are ancillary resources upon which cloud-native systems depend. Message queues are backing services. The Azure cloud supports two types of message queues that your cloud-native systems can consume to implement command messaging: Azure Storage Queues and Azure Service Bus Queues.
Azure Storage Queues
Azure storage queues offer a simple queueing infrastructure that is fast, affordable, and backed by Azure storage accounts. Azure Storage Queues feature a REST-based queuing mechanism with reliable and persistent messaging. They provide a minimal feature set, but are inexpensive and store millions of messages. Their capacity ranges up to 500 TB. A single message can be up to 64 KB in size. You can access messages from anywhere in the world via authenticated calls using HTTP or HTTPS. Storage queues can scale out to large numbers of concurrent clients to handle traffic spikes. That said, there are limitations with the service:
Message order isn't guaranteed.
A message can only persist for seven days before it's automatically removed.
Support for state management, duplicate detection, or transactions isn't available.
Azure Service Bus Queues
For more complex messaging requirements, consider Azure Service Bus queues. Sitting atop a robust message infrastructure, Azure Service Bus supports a brokered messaging model. Messages are reliably stored in a broker (the queue) until received by the consumer. The queue guarantees First-In/First-Out (FIFO) message delivery, respecting the order in which messages were added to the queue. The size of a message can be much larger, up to 256 KB. Messages are persisted in the queue for an unlimited period of time. Service Bus supports not only HTTP-based calls, but also provides full support for the AMQP protocol. AMQP is an open-standard across vendors that supports a binary protocol and higher degrees of reliability. Service Bus provides a rich set of features, including transaction support and a duplicate detection feature. The queue guarantees "at most once delivery" per message. It automatically discards a message that has already been sent. If a producer is in doubt, it can resend the same message, and Service Bus guarantees that only one copy will be processed. Duplicate detection frees you from having to build additional infrastructure plumbing. Two more enterprise features are partitioning and sessions. A conventional Service Bus queue is handled by a single message broker and stored in a single message store. But, Service Bus Partitioning spreads the queue across multiple message brokers and message stores. The overall throughput is no longer limited by the performance of a single message broker or messaging store. A temporary outage of a messaging store doesn't render a partitioned queue unavailable. Service Bus Sessions provide a way to group-related messages. Imagine a workflow scenario where messages must be processed together and the operation completed at the end. To take advantage, sessions must be explicitly enabled for the queue and each related messaged must contain the same session ID. However, there are some important caveats: Service Bus queues size is limited to 80 GB, which is much smaller than what's available from store queues. Additionally, Service Bus queues incur a base cost and charge per operation. Figure 4-14 outlines the high-level architecture of a Service Bus queue. Figure 4-14. Service Bus queue In the previous figure, note the point-to-point relationship. Two instances of the same provider are enqueuing messages into a single Service Bus queue. Each message is consumed by only one of three consumer instances on the right. Next, we discuss how to implement messaging where different consumers may all be interested the same message.
Message queuing is an effective way to implement communication where a producer can asynchronously send a consumer a message. However, what happens when many different consumers are interested in the same message? A dedicated message queue for each consumer wouldn't scale well and would become difficult to manage. To address this scenario, we move to the third type of message interaction, the event. One microservice announces that an action had occurred. Other microservices, if interested, react to the action, or event. Eventing is a two-step process. For a given state change, a microservice publishes an event to a message broker, making it available to any other interested microservice. The interested microservice is notified by subscribing to the event in the message broker. You use the Publish/Subscribe pattern to implement event-based communication. Figure 4-15 shows a shopping basket microservice publishing an event with two other microservices subscribing to it. Figure 4-15. Event-Driven messaging Note the event bus component that sits in the middle of the communication channel. It's a custom class that encapsulates the message broker and decouples it from the underlying application. The ordering and inventory microservices independently operate the event with no knowledge of each other, nor the shopping basket microservice. When the registered event is published to the event bus, they act upon it. With eventing, we move from queuing technology to topics. A topic is similar to a queue, but supports a one-to-many messaging pattern. One microservice publishes a message. Multiple subscribing microservices can choose to receive and act upon that message. Figure 4-16 shows a topic architecture. Figure 4-16. Topic architecture In the previous figure, publishers send messages to the topic. At the end, subscribers receive messages from subscriptions. In the middle, the topic forwards messages to subscriptions based on a set of rules, shown in dark blue boxes. Rules act as a filter that forward specific messages to a subscription. Here, a "GetPrice" event would be sent to the price and logging Subscriptions as the logging subscription has chosen to receive all messages. A "GetInformation" event would be sent to the information and logging subscriptions. The Azure cloud supports two different topic services: Azure Service Bus Topics and Azure EventGrid.
Azure Service Bus Topics
Sitting on top of the same robust brokered message model of Azure Service Bus queues are Azure Service Bus Topics. A topic can receive messages from multiple independent publishers and send messages to up to 2,000 subscribers. Subscriptions can be dynamically added or removed at runtime without stopping the system or recreating the topic. Many advanced features from Azure Service Bus queues are also available for topics, including Duplicate Detection and Transaction support. By default, Service Bus topics are handled by a single message broker and stored in a single message store. But, Service Bus Partitioning scales a topic by spreading it across many message brokers and message stores. Scheduled Message Delivery tags a message with a specific time for processing. The message won't appear in the topic before that time. Message Deferral enables you to defer a retrieval of a message to a later time. Both are commonly used in workflow processing scenarios where operations are processed in a particular order. You can postpone processing of received messages until prior work has been completed. Service Bus topics are a robust and proven technology for enabling publish/subscribe communication in your cloud-native systems.
Azure Event Grid
While Azure Service Bus is a battle-tested messaging broker with a full set of enterprise features, Azure Event Grid is the new kid on the block. At first glance, Event Grid may look like just another topic-based messaging system. However, it's different in many ways. Focused on event-driven workloads, it enables real-time event processing, deep Azure integration, and an open-platform - all on serverless infrastructure. It's designed for contemporary cloud-native and serverless applications As a centralized eventing backplane, or pipe, Event Grid reacts to events inside Azure resources and from your own services. Event notifications are published to an Event Grid Topic, which, in turn, routes each event to a subscription. Subscribers map to subscriptions and consume the events. Like Service Bus, Event Grid supports a filtered subscriber model where a subscription sets rule for the events it wishes to receive. Event Grid provides fast throughput with a guarantee of 10 million events per second enabling near real-time delivery - far more than what Azure Service Bus can generate. A sweet spot for Event Grid is its deep integration into the fabric of Azure infrastructure. An Azure resource, such as Cosmos DB, can publish built-in events directly to other interested Azure resources - without the need for custom code. Event Grid can publish events from an Azure Subscription, Resource Group, or Service, giving developers fine-grained control over the lifecycle of cloud resources. However, Event Grid isn't limited to Azure. It's an open platform that can consume custom HTTP events published from applications or third-party services and route events to external subscribers. When publishing and subscribing to native events from Azure resources, no coding is required. With simple configuration, you can integrate events from one Azure resource to another leveraging built-in plumbing for Topics and Subscriptions. Figure 4-17 shows the anatomy of Event Grid. Figure 4-17. Event Grid anatomy A major difference between EventGrid and Service Bus is the underlying message exchange pattern. Service Bus implements an older style pull model in which the downstream subscriber actively polls the topic subscription for new messages. On the upside, this approach gives the subscriber full control of the pace at which it processes messages. It controls when and how many messages to process at any given time. Unread messages remain in the subscription until processed. A significant shortcoming is the latency between the time the event is generated and the polling operation that pulls that message to the subscriber for processing. Also, the overhead of constant polling for the next event consumes resources and money. EventGrid, however, is different. It implements a push model in which events are sent to the EventHandlers as received, giving near real-time event delivery. It also reduces cost as the service is triggered only when it's needed to consume an event – not continually as with polling. That said, an event handler must handle the incoming load and provide throttling mechanisms to protect itself from becoming overwhelmed. Many Azure services that consume these events, such as Azure Functions and Logic Apps provide automatic autoscaling capabilities to handle increased loads. Event Grid is a fully managed serverless cloud service. It dynamically scales based on your traffic and charges you only for your actual usage, not pre-purchased capacity. The first 100,000 operations per month are free – operations being defined as event ingress (incoming event notifications), subscription delivery attempts, management calls, and filtering by subject. With 99.99% availability, EventGrid guarantees the delivery of an event within a 24-hour period, with built-in retry functionality for unsuccessful delivery. Undelivered messages can be moved to a "dead-letter" queue for resolution. Unlike Azure Service Bus, Event Grid is tuned for fast performance and doesn't support features like ordered messaging, transactions, and sessions.
Streaming messages in the Azure cloud
Azure Service Bus and Event Grid provide great support for applications that expose single, discrete events like a new document has been inserted into a Cosmos DB. But, what if your cloud-native system needs to process a stream of related events? Event streams are more complex. They're typically time-ordered, interrelated, and must be processed as a group. Azure Event Hub is a data streaming platform and event ingestion service that collects, transforms, and stores events. It's fine-tuned to capture streaming data, such as continuous event notifications emitted from a telemetry context. The service is highly scalable and can store and process millions of events per second. Shown in Figure 4-18, it's often a front door for an event pipeline, decoupling ingest stream from event consumption. Figure 4-18. Azure Event Hub Event Hub supports low latency and configurable time retention. Unlike queues and topics, Event Hubs keep event data after it's been read by a consumer. This feature enables other data analytic services, both internal and external, to replay the data for further analysis. Events stored in event hub are only deleted upon expiration of the retention period, which is one day by default, but configurable. Event Hub supports common event publishing protocols including HTTPS and AMQP. It also supports Kafka 1.0. Existing Kafka applications can communicate with Event Hub using the Kafka protocol providing an alternative to managing large Kafka clusters. Many open-source cloud-native systems embrace Kafka. Event Hubs implements message streaming through a partitioned consumer model in which each consumer only reads a specific subset, or partition, of the message stream. This pattern enables tremendous horizontal scale for event processing and provides other stream-focused features that are unavailable in queues and topics. A partition is an ordered sequence of events that is held in an event hub. As newer events arrive, they're added to the end of this sequence. Figure 4-19 shows partitioning in an Event Hub. Figure 4-19. Event Hub partitioning Instead of reading from the same resource, each consumer group reads across a subset, or partition, of the message stream. For cloud-native applications that must stream large numbers of events, Azure Event Hub can be a robust and affordable solution. About the Author: Rob Vettor is a Principal Cloud-Native Architect for the Microservice Enterprise Service Group. Reach out to Rob at [[email protected]](mailto:[email protected]) orhttps://thinkingincloudnative.com/weclome-to-cloud-native/
This is something I picked up from stockTwits and recently started looking at Brinavess is an antiarrhythmic drug for the rapid conversion of adult patients with recent onset atrial fibrillation (AF) AIUI this basically is to help you deal with cardiovascular disease specifically for people with arrthymic issues developed from various risk factors It's been used for years, with over 55,000+ patients treated in 41 countries Years ago it tried to get approved in the US but they had some issue by which someone in their clinical trial died which caused it to pause and required more evidence that the death was not related to the drug itself. Due to this there is a bearish thesis that the FDA hates the drug and views it as very unsafe and risky. They are now years later having completed somewhere around 8-9 Phase 2 and Phase 3 trials, and having a ton of real world data from real patients around the world where it works well. it is about to go through Adcom Tuesday, when it will be suspended for trading, and has PDUFA scheduled for December 24th It is currently dipped to what is not just a 52 week low but a five year low from what I can tell. Just last week it was at 2$, and Friday when briefing document seems to have been leaked including risk concerns from FDA staffers to recommend the Adcom consider avoiding passing the drug, this thing fell to 1.30 (apparently this is standard and also similar to what happened with AGRX recently which went through similar cycle) Years ago, it had already gotten passed by the Adcom when it was approaching US FDA approval. The likelihood of it not getting passed now, years and years later with it being approved and used by patients world wide seems very low FDA is still an unclear situation. It really should get approved, especially with a more lenient approval process under Trump, but it could potentially go sideways (and the company sat down with FDA prior to filing which costs a million dollars to go through with). I'm still working to understand expected revenue if this gets approved, but if this gets approved by Adcom (which I am willing to bet on occurring), then it should shoot up at least to 2.50 in my opinion, given it was at 2$ prior to the FUD about Adcom report, I realistically expect it to shoot up to 3, anything above 3 is free money and profit I would lock in. It likely will pull back a little from the spike to 3, and will end up settling around 2-3$ as it gets closer to FDA decision. Price targets on this have it at 6-7$ if it gets FDA approved. I think a safe option is buying either December or January 2.5 Calls and selling on the pop from Adcom decision Wednesday If it hits 4$ and you buy these calls Monday around 1.30 it can be a 10x increase (worth a 200$ yolo at least in my opinion) It will be in SSR Monday due to declining 33% from shorts and the bearish sentiment Friday. Despite that it may dip again tomorrow as people flee binary event, so keep that in mind with respect to how you buy shares and calls if it matters to you a lot Shares is also a good idea, especially if you are at a broker that can do pre-market or after hours trading, since your shares can sell and capture the really high peak price spikes (AUPH for example hit 20+ after hours AIUI, but opened lower) Shares are a good idea because without time pressure you can realize longer time horizon gains. They are in the process of negotiating licensing their drug to China which will additionally help grow revenues Disclaimer: All of the above is based on my research driven by a lot of what the Stock Twits board has shared where I got the tip from and some really diligent people sharing info. I think this is a good speculative flip option, though I may end up holding for FDA depending what it spikes to on the Adcom and how much it pulls back Right now I'm in 3400$ in shares on 401k, going to buy 7k more tomorrow, maybe more if we have further pull backs Will also buy january 2.5C, probably 1500 worth in brokerage with 6-7k in shares, especially if it dips below 1.30
In order to create an account on BitMEX, users first have to register with the website. Registration only requires an email address, the email address must be a genuine address as users will receive an email to confirm registration in order to verify the account. Once users are registered, there are no trading limits. Traders must be at least 18 years of age to sign up. https://preview.redd.it/0v13qoil3cc41.jpg?width=808&format=pjpg&auto=webp&s=e6134bc089c4e352dce10d754dc84ff11a4c7994 However, it should be noted that BitMEX does not accept any US-based traders and will use IP checks to verify that users are not in the US. While some US users have bypassed this with the use of a VPN, it is not recommended that US individuals sign up to the BitMEX service, especially given the fact that alternative exchanges are available to service US customers that function within the US legal framework. How to Use BitMEX BitMEX allows users to trade cryptocurrencies against a number of fiat currencies, namely the US Dollar, the Japanese Yen and the Chinese Yuan. BitMEX allows users to trade a number of different cryptocurrencies, namely Bitcoin, Bitcoin Cash, Dash, Ethereum, Ethereum Classic, Litecoin, Monero, Ripple, Tezos and Zcash. The trading platform on BitMEX is very intuitive and easy to use for those familiar with similar markets. However, it is not for the beginner. The interface does look a little dated when compared to newer exchanges like Binance and Kucoin’s. Once users have signed up to the platform, they should click on Trade, and all the trading instruments will be displayed beneath. Clicking on the particular instrument opens the orderbook, recent trades, and the order slip on the left. The order book shows three columns – the bid value for the underlying asset, the quantity of the order, and the total USD value of all orders, both short and long. The widgets on the trading platform can be changed according to the user’s viewing preferences, allowing users to have full control on what is displayed. It also has a built in feature that provides for TradingView charting. This offers a wide range of charting tool and is considered to be an improvement on many of the offering available from many of its competitors. https://preview.redd.it/fabg1nxo3cc41.jpg?width=808&format=pjpg&auto=webp&s=6d939889c3eac15ab1e78ec37a8ccd13fc5e0573 Once trades are made, all orders can be easily viewed in the trading platform interface. There are tabs where users can select their Active Orders, see the Stops that are in place, check the Orders Filled (total or partially) and the trade history. On the Active Orders and Stops tabs, traders can cancel any order, by clicking the “Cancel” button. Users also see all currently open positions, with an analysis if it is in the black or red. BitMEX uses a method called auto-deleveraging which BitMEX uses to ensure that liquidated positions are able to be closed even in a volatile market. Auto-deleveraging means that if a position bankrupts without available liquidity, the positive side of the position deleverages, in order of profitability and leverage, the highest leveraged position first in queue. Traders are always shown where they sit in the auto-deleveraging queue, if such is needed. Although the BitMEX platform is optimized for mobile, it only has an Android app (which is not official). There is no iOS app available at present. However, it is recommended that users use it on the desktop if possible. BitMEX offers a variety of order types for users:
Limit Order (the order is fulfilled if the given price is achieved);
Market Order (the order is executed at current market price);
Stop Limit Order (like a stop order, but allows users to set the price of the Order once the Stop Price is triggered);
Stop Market Order (this is a stop order that does not enter the order book, remain unseen until the market reaches the trigger);
Trailing Stop Order (it is similar to a Stop Market order, but here users set a trailing value that is used to place the market order);
Take Profit Limit Order (this can be used, similarly to a Stop Order, to set a target price on a position. In this case, it is in respect of making gains, rather than cutting losses);
Take Profit Market Order (same as the previous type, but in this case, the order triggered will be a market order, and not a limit one)
The exchange offers margin trading in all of the cryptocurrencies displayed on the website. It also offers to trade with futures and derivatives – swaps.
Futures and Swaps
A futures contract is an agreement to buy or sell a given asset in the future at a predetermined price. On BitMEX, users can leverage up to 100x on certain contracts. Perpetual swaps are similar to futures, except that there is no expiry date for them and no settlement. Additionally, they trade close to the underlying reference Index Price, unlike futures, which may diverge substantially from the Index Price. BitMEX also offers Binary series contracts, which are prediction-based contracts which can only settle at either 0 or 100. In essence, the Binary series contracts are a more complicated way of making a bet on a given event. The only Binary series betting instrument currently available is related to the next 1mb block on the Bitcoin blockchain. Binary series contracts are traded with no leverage, a 0% maker fee, a 0.25% taker fee and 0.25% settlement fee.
BitMEX allows its traders to leverage their position on the platform. Leverage is the ability to place orders that are bigger than the users’ existing balance. This could lead to a higher profit in comparison when placing an order with only the wallet balance. Trading in such conditions is called “Margin Trading.” There are two types of Margin Trading: Isolated and Cross-Margin. The former allows the user to select the amount of money in their wallet that should be used to hold their position after an order is placed. However, the latter provides that all of the money in the users’ wallet can be used to hold their position, and therefore should be treated with extreme caution. https://preview.redd.it/eg4qk9qr3cc41.jpg?width=808&format=pjpg&auto=webp&s=c3ca8cdf654330ce53e8138d774e72155acf0e7e The BitMEX platform allows users to set their leverage level by using the leverage slider. A maximum leverage of 1:100 is available (on Bitcoin and Bitcoin Cash). This is quite a high level of leverage for cryptocurrencies, with the average offered by other exchanges rarely exceeding 1:20.
BitMEX does not charge fees on deposits or withdrawals. However, when withdrawing Bitcoin, the minimum Network fee is based on blockchain load. The only costs therefore are those of the banks or the cryptocurrency networks. As noted previously, BitMEX only accepts deposits in Bitcoin and therefore Bitcoin serves as collateral on trading contracts, regardless of whether or not the trade involves Bitcoin. The minimum deposit is 0.001 BTC. There are no limits on withdrawals, but withdrawals can also be in Bitcoin only. To make a withdrawal, all that users need to do is insert the amount to withdraw and the wallet address to complete the transfer. https://preview.redd.it/xj1kbuew3cc41.jpg?width=808&format=pjpg&auto=webp&s=68056f2247001c63e89c880cfbb75b2f3616e8fe Deposits can be made 24/7 but withdrawals are processed by hand at a recurring time once per day. The hand processed withdrawals are intended to increase the security levels of users’ funds by providing extra time (and email notice) to cancel any fraudulent withdrawal requests, as well as bypassing the use of automated systems & hot wallets which may be more prone to compromise.
BitMEX operates as a crypto to crypto exchange and makes use of a Bitcoin-in/Bitcoin-out structure. Therefore, platform users are currently unable to use fiat currencies for any payments or transfers, however, a plus side of this is that there are no limits for trading and the exchange incorporates trading pairs linked to the US Dollar (XBT), Japanese Yen (XBJ), and Chinese Yuan (XBC). BitMEX supports the following cryptocurrencies:
Bitcoin Cash (BCH)
Ethereum Classic (ETC)
Ripple Token (XRP)
EOS Token (EOS)
BitMEX also offers leverage options on the following coins:
5x: Zcash (ZEC)
20x : Ripple (XRP),Bitcoin Cash (BCH), Cardano (ADA), EOS Token (EOS), Tron (TRX)
HDR Global Trading, the company which owns BitMEX, has recently announced a partnership with Trading Technologies International, Inc. (TT), a leading international high-performance trading software provider. The TT platform is designed specifically for professional traders, brokers, and market-access providers, and incorporates a wide variety of trading tools and analytical indicators that allow even the most advanced traders to customize the software to suit their unique trading styles. The TT platform also provides traders with global market access and trade execution through its privately managed infrastructure and the partnership will see BitMEX users gaining access to the trading tools on all BitMEX products, including the popular XBT/USD Perpetual Swap pairing. https://preview.redd.it/qcqunaby3cc41.png?width=672&format=png&auto=webp&s=b77b45ac2b44a9af30a4985e3d9dbafc9bbdb77c
The BitMEX Insurance Fund
The ability to trade on leverage is one of the exchange’s main selling points and offering leverage and providing the opportunity for traders to trade against each other may result in a situation where the winners do not receive all of their expected profits. As a result of the amounts of leverage involved, it’s possible that the losers may not have enough margin in their positions to pay the winners. Traditional exchanges like the Chicago Mercantile Exchange (CME) offset this problem by utilizing multiple layers of protection and cryptocurrency trading platforms offering leverage cannot currently match the levels of protection provided to winning traders. In addition, cryptocurrency exchanges offering leveraged trades propose a capped downside and unlimited upside on a highly volatile asset with the caveat being that on occasion, there may not be enough funds in the system to pay out the winners. To help solve this problem, BitMEX has developed an insurance fund system, and when a trader has an open leveraged position, their position is forcefully closed or liquidated when their maintenance margin is too low. Here, a trader’s profit and loss does not reflect the actual price their position was closed on the market, and with BitMEX when a trader is liquidated, their equity associated with the position drops down to zero. In the following example, the trader has taken a 100x long position. In the event that the mark price of Bitcoin falls to $3,980 (by 0.5%), then the position gets liquidated with the 100 Bitcoin position needing to be sold on the market. This means that it does not matter what price this trade executes at, namely if it’s $3,995 or $3,000, as from the view of the liquidated trader, regardless of the price, they lose all the equity they had in their position, and lose the entire one Bitcoin. https://preview.redd.it/wel3rka04cc41.png?width=669&format=png&auto=webp&s=3f93dac2d3b40aa842d281384113d2e26f25947e Assuming there is a fully liquid market, the bid/ask spread should be tighter than the maintenance margin. Here, liquidations manifest as contributions to the insurance fund (e.g. if the maintenance margin is 50bps, but the market is 1bp wide), and the insurance fund should rise by close to the same amount as the maintenance margin when a position is liquidated. In this scenario, as long as healthy liquid markets persist, the insurance fund should continue its steady growth. The following graphs further illustrate the example, and in the first chart, market conditions are healthy with a narrow bid/ask spread (just $2) at the time of liquidation. Here, the closing trade occurs at a higher price than the bankruptcy price (the price where the margin balance is zero) and the insurance fund benefits. Illustrative example of an insurance contribution – Long 100x with 1 BTC collateral https://preview.redd.it/is89ep924cc41.png?width=699&format=png&auto=webp&s=f0419c68fe88703e594c121b5b742c963c7e2229 (Note: The above illustration is based on opening a 100x long position at $4,000 per BTC and 1 Bitcoin of collateral. The illustration is an oversimplification and ignores factors such as fees and other adjustments. The bid and offer prices represent the state of the order book at the time of liquidation. The closing trade price is $3,978, representing $1 of slippage compared to the $3,979 bid price at the time of liquidation.) The second chart shows a wide bid/ask spread at the time of liquidation, here, the closing trade takes place at a lower price than the bankruptcy price, and the insurance fund is used to make sure that winning traders receive their expected profits. This works to stabilize the potential for returns as there is no guarantee that healthy market conditions can continue, especially during periods of heightened price volatility. During these periods, it’s actually possible that the insurance fund can be used up than it is built up. Illustrative example of an insurance depletion – Long 100x with 1 BTC collateral https://preview.redd.it/vb4mj3n54cc41.png?width=707&format=png&auto=webp&s=0c63b7c99ae1c114d8e3b947fb490e9144dfe61b (Notes: The above illustration is based on opening a 100x long position at $4,000 per BTC and 1 Bitcoin of collateral. The illustration is an oversimplification and ignores factors such as fees and other adjustments. The bid and offer prices represent the state of the order book at the time of liquidation. The closing trade price is $3,800, representing $20 of slippage compared to the $3,820 bid price at the time of liquidation.) The exchange declared in February 2019, that the BitMEX insurance fund retained close to 21,000 Bitcoin (around $70 million based on Bitcoin spot prices at the time). This figure represents just 0.007% of BitMEX’s notional annual trading volume, which has been quoted as being approximately $1 trillion. This is higher than the insurance funds as a proportion of trading volume of the CME, and therefore, winning traders on BitMEX are exposed to much larger risks than CME traders as:
BitMEX does not have clearing members with large balance sheets and traders are directly exposed to each other.
BitMEX does not demand payments from traders with negative account balances.
The underlying instruments on BitMEX are more volatile than the more traditional instruments available on CME.
Therefore, with the insurance fund remaining capitalized, the system effectively with participants who get liquidated paying for liquidations, or a losers pay for losers mechanism. This system may appear controversial as first, though some may argue that there is a degree of uniformity to it. It’s also worth noting that the exchange also makes use of Auto Deleveraging which means that on occasion, leveraged positions in profit can still be reduced during certain time periods if a liquidated order cannot be executed in the market. More adventurous traders should note that while the insurance fund holds 21,000 Bitcoin, worth approximately 0.1% of the total Bitcoin supply, BitMEX still doesn’t offer the same level of guarantees to winning traders that are provided by more traditional leveraged trading platforms. Given the inherent volatility of the cryptocurrency market, there remains some possibility that the fund gets drained down to zero despite its current size. This may result in more successful traders lacking confidence in the platform and choosing to limit their exposure in the event of BitMEX being unable to compensate winning traders.
How suitable is BitMEX for Beginners?
BitMEX generates high Bitcoin trading levels, and also attracts good levels of volume across other crypto-to-crypto transfers. This helps to maintain a buzz around the exchange, and BitMEX also employs relatively low trading fees, and is available round the world (except to US inhabitants). This helps to attract the attention of people new to the process of trading on leverage and when getting started on the platform there are 5 main navigation Tabs to get used to:
**Trade:**The trading dashboard of BitMEX. This tab allows you to select your preferred trading instrument, and choose leverage, as well as place and cancel orders. You can also see your position information and view key information in the contract details.
**Account:**Here, all your account information is displayed including available Bitcoin margin balances, deposits and withdrawals, and trade history.
**Contracts:**This tab covers further instrument information including funding history, contract sizes; leverage offered expiry, underlying reference Price Index data, and other key features.
**References:**This resource centre allows you to learn about futures, perpetual contracts, position marking, and liquidation.
**API:**From here you can set up an API connection with BitMEX, and utilize the REST API and WebSocket API.
BitMEX also employs 24/7 customer support and the team can also be contacted on their Twitter and Reddit accounts. In addition, BitMEX provides a variety of educational resources including an FAQ section, Futures guides, Perpetual Contracts guides, and further resources in the “References” account tab. For users looking for more in depth analysis, the BitMEX blog produces high level descriptions of a number of subjects and has garnered a good reputation among the cryptocurrency community. Most importantly, the exchange also maintains a testnet platform, built on top of testnet Bitcoin, which allows anyone to try out programs and strategies before moving on to the live exchange. This is crucial as despite the wealth of resources available, BitMEX is not really suitable for beginners, and margin trading, futures contracts and swaps are best left to experienced, professional or institutional traders. Margin trading and choosing to engage in leveraged activity are risky processes and even more advanced traders can describe the process as a high risk and high reward “game”. New entrants to the sector should spend a considerable amount of time learning about margin trading and testing out strategies before considering whether to open a live account.
Is BitMEX Safe?
BitMEX is widely considered to have strong levels of security. The platform uses multi-signature deposits and withdrawal schemes which can only be used by BitMEX partners. BitMEX also utilises Amazon Web Services to protect the servers with text messages and two-factor authentication, as well as hardware tokens. BitMEX also has a system for risk checks, which requires that the sum of all account holdings on the website must be zero. If it’s not, all trading is immediately halted. As noted previously, withdrawals are all individually hand-checked by employees, and private keys are never stored in the cloud. Deposit addresses are externally verified to make sure that they contain matching keys. If they do not, there is an immediate system shutdown. https://preview.redd.it/t04qs3484cc41.jpg?width=808&format=pjpg&auto=webp&s=a3b106cbc9116713dcdd5e908c00b555fd704ee6 In addition, the BitMEX trading platform is written in kdb+, a database and toolset popular amongst major banks in high frequency trading applications. The BitMEX engine appears to be faster and more reliable than some of its competitors, such as Poloniex and Bittrex. They have email notifications, and PGP encryption is used for all communication. The exchange hasn’t been hacked in the past.
How Secure is the platform?
As previously mentioned, BitMEX is considered to be a safe exchange and incorporates a number of security protocols that are becoming standard among the sector’s leading exchanges. In addition to making use of Amazon Web Services’ cloud security, all the exchange’s systems can only be accessed after passing through multiple forms of authentication, and individual systems are only able to communicate with each other across approved and monitored channels. Communication is also further secured as the exchange provides optional PGP encryption for all automated emails, and users can insert their PGP public key into the form inside their accounts. Once set up, BitMEX will encrypt and sign all the automated emails sent by you or to your account by the [[email protected]](mailto:[email protected]) email address. Users can also initiate secure conversations with the support team by using the email address and public key on the Technical Contact, and the team have made their automated system’s PGP key available for verification in their Security Section. The platform’s trading engine is written in kdb+, a database and toolset used by leading financial institutions in high-frequency trading applications, and the speed and reliability of the engine is also used to perform a full risk check after every order placement, trade, settlement, deposit, and withdrawal. All accounts in the system must consistently sum to zero, and if this does not happen then trading on the platform is immediately halted for all users. With regards to wallet security, BitMEX makes use of a multisignature deposit and withdrawal scheme, and all exchange addresses are multisignature by default with all storage being kept offline. Private keys are not stored on any cloud servers and deep cold storage is used for the majority of funds. Furthermore, all deposit addresses sent by the BitMEX system are verified by an external service that works to ensure that they contain the keys controlled by the founders, and in the event that the public keys differ, the system is immediately shut down and trading halted. The exchange’s security practices also see that every withdrawal is audited by hand by a minimum of two employees before being sent out.
BitMEX Customer Support
The trading platform has a 24/7 support on multiple channels, including email, ticket systems and social media. The typical response time from the customer support team is about one hour, and feedback on the customer support generally suggest that the customer service responses are helpful and are not restricted to automated responses. https://preview.redd.it/8k81zl0a4cc41.jpg?width=808&format=pjpg&auto=webp&s=e30e5b7ca93d2931f49e2dc84025f2fda386eab1 The BitMEX also offers a knowledge base and FAQs which, although they are not necessarily always helpful, may assist and direct users towards the necessary channels to obtain assistance. BitMEX also offers trading guides which can be accessed here
There would appear to be few complaints online about BitMEX, with most issues relating to technical matters or about the complexities of using the website. Older complaints also appeared to include issues relating to low liquidity, but this no longer appears to be an issue. BitMEX is clearly not a platform that is not intended for the amateur investor. The interface is complex and therefore it can be very difficult for users to get used to the platform and to even navigate the website. However, the platform does provide a wide range of tools and once users have experience of the platform they will appreciate the wide range of information that the platform provides. Visit BitMEX
My name is Omar and I have made an “investment” With TorOption.com in the hope to better my life and I have been scammed, here is my story: I came across TorOption through social media (Facebook to be exact) and was interested in making some extra cash on the side, I did not know much about Binary Options nor Trading for that matter, but I was interested in finding out more. Shortly after creating an account with TorOption Scott from Toroption contacted me and began telling me stories about the benefits of working with them and how it has helped so many people better their lives from a financial perspective. He pushed me to deposit money into my account in order for me to be able to “trade”. The minimum investment was 250.00 USD which I went ahead and put through to see what could possibly happen. In order to protect themselves, they asked me for copies of the card I used to deposit the money with, they took a copy of my ID and proof of address in order for them to cover themselves and make it seem “Justified”, they even made me sign a declaration form of deposit, everything that they can use against me moving forward. My account was created one the Toroption website which you can search for and find, This is when the scam began and must I say, what professional scammers they are… We began trading with the small amount of 250.00 USD and they showed me a few winning trades which made me feel as if this actually might be the real deal, please note that this was all through their website and this information might be portrayed and adjusted as they see fit as it is a proxy. Website. When I asked to withdraw my winnings, they would always ask me why? And “Are you in this for a couple hundred dollars? Or are you here to make real money?” Which pushed me to invest another 1,350.00 USD. They started making me feel as if I was special using the “Bonus” Scheme which basically provides me with extra money provided by TorOption to trade further and open further positions. As time went by and we began trading they continued to push me to invest further and further. The broker that goes by the name of Dina, l continued to push me to invest further by claiming that she operates on a commission basis and that should I wish to continue to get her advice on what positions to place, I need to invest further, I recall her saying “Why would I trade with a thousand dollars or 2 thousand dollars, the commission won’t even buy my lunch!”. Given the fact I had no experience with trading and what positions to put, I felt pressured into investing more to keep her advising me on what positions to place. So I went on to invest an additional 6,200.00 USD. After putting through some positions and making a few trades, we had lost some of those trades and I became frustrated with her “advice”, I started to request for my money back which she never approved for me. This is when the second part of the scam began and this went even further, she told me that I should speak to her “Boss” and that he has an offer for me. This is when I met Reda, Reda was telling me “why you want to pull out your money when you haven’t made any real profit yet?”, he continued to play on my emotional vulnerability of asking about my family and what I desire in life. When he found out that I lost my father last year and that I was struggling to make ends meet, on top of this I have a younger brother who just graduated high school and I am still trying to figure out how I will pay for his university education or the rent and the constant bills, he capitalized on this matter and pushed me to invest even further! I simply told him I do not have the money. He went on by saying get it from your mother or your friends… I told him that simply is not an option, This is when he played me by offering me what they call an “Insurance Contract” He said I am willing to provide you with 3 insurance contracts, each one worth 10,000.00 USD, He claimed that this is the best way to trade with us and that should you fail with the positions, at least your initial investment is safe, on top of this he said that if you invest another 15,000.00 USD I will become an “Executive” Member and that I will have Dina assistance on a weekly basis for market hints and advise on what positions to place. Hearing this, like a fool I actually went to my mother and got from her 15,000.00 USD and invested with them the full amount in hope to make more money. We began trading on Long Term Binary Trades and actually lost all the major big positions, which meant I had to use my “Insurance Contracts” So they went ahead and “Reimbursed” me the money, or at least as it would show on the account. To leverage our losses from those positions we went on to trade on Gold – Long Term, and we had a strong position put forth with 10,000.00 USD, Dina called and said that this is a 100% in the money and that if I invest another 10,000.00 USD dollars right now, I can leverage all the money we lost previously by “Doubling up” on that position. Again, like a fool, I went ahead and invested another 4,907.00 USD (because it was all the money I had) and she gave me a “bonus” of 5,500.00 USD to double up on the position… which was shortly lost. Overall, I ended up investing with them a total of 26,707.00 USD and I have gotten back from them a total of 2,918.00 USD… They really scammed me big time. After all this, I screamed and shouted at Dina and told her I want out, I want my money back, she disappeared for a few days to come back to me and say “I am leaving for a seminar on wall street and Reda (my boss) will take your account from here” The guy I supposedly trusted… and was the major reason why I invested the 15,000.00 USD. When I spoke to Reda, he told me that I am unable to withdraw any of my money due to the fact that I did not reach the “Minimum turnover required” In order for me to qualify for a withdrawal. He kept saying “I am on your side, I want to help you.” Rather than actually giving me my money, he told me that due to the fact that I took the insurance money, I needed to make enough trades to reach my turnover, which has reached to 1,200,000.00 USD! Which is literally impossible to reach when you have only 15k in your account to trade with. Now he is asking me to invest even more!! He is claiming that if I invest another 24,000.00 USD I will become a “VIP Member” And will have access to VIP Trades which I currently do not have access to and that my turnover will decrease by 40% which will allow me to make a withdrawal sooner. After all this happened I started researching online and realized that I am not the only one who got fooled by this scam, many others in my positions have made a similar mistake and these scammers make ridiculous amounts of money off of peoples hard earned money. Toroption is not even licensed no Certified! Finding this out shocked me to my very core. Reda was asking me to take a loan, borrow from family, friends, he was willing to throw me deeper in debt as long as he keeps getting more money across. Toroption is a legit scam, they have taken from me a lot of money and the sad part is, it isn’t even about the money, it really cuts you deep, they make you feel like a fool even though I would like to consider myself sharper than others. Your pride takes a hit, you feel embarrassed, and talking about it or even writing about it pains me. We need to bring them to justice, I am not the only one, many others have made the same mistake I have and I would appreciate your help in getting my money back and stopping them before they scam innocent hard working people moving forward. This company you are supporting is a SCAM! And if you have any business ethics, you will help me fight this off. I have all emails, documents, contracts, etc… everything is available, and I just want this to stop. I am deep in debt now because of this, my mother does not know of my mistake and she still expects to get her money back which I will get back to her on my own, from my hard earned money, she cannot know that I have been scammed it will break her heart. At 24 I lost my father and had to become a responsible man I don’t think I was ready for and take care of everything and it is a struggle. For someone to come and take advantage of my situation to make money off of it is sick and disheartening. This is my story. Thank you for reading it all the way through. Are you willing to help me and many others stop this scam from going even further? Best, Omar
Crack Binary Software Scam Review Thomas Mallon Busted
Crack Brokers Software was just out a few minutes ago and has already gone viral. miserably, this is the newest binary trading software to shock the ever busy binary trading world. Thomas Mallon claims to be the landlord of this Crack Brokers Software Scam during the video presentation at www.crackbrokers.net. We have actual and convincing proof that this app is a total FRAUD and should be avoided at all costs. We have got various emails from our latest subscribers who claim to have lost all their money once they deposited with this Crack Brokers Software trading’s account. We did a careful and full investigation and came up with the full description in order to warn binary traders to stay clear from this online scammers. Make sure to read this clear review before make any deposits and get to know our full findings as why we believe Crack Brokers Software is a Complete Scam! PS: AN ALTERNATIVE TO CRACK BROKERS SOFTWARE IS THE TRUSTED, TESTED AND APPROVED BINARY-AUTO TRADER The Developer According to the story behind this app’s creation, Thomas Mallon is the founder, creator and CEO of Crack Brokers Software which is a winning trading automated robot that uses a one of a type algorithm that has an amazing 98.8% appealing ratio. Thomas is giving away 15 spots to new users and one you exit the site’s webpage, you will drop that one of a duration opportunity to become a millionaire and earning a staggering amount of money every day for the rest of your life. Even before we begin revealing this scam, you should note that after scrolling down the app’s homepage, you will understand that the date Sunday the 17th as a day they earned profits. Markets are closed during the weekends. This is the first mistake these scammers make. How can these traders be making money when all the financial markets in the world are closed? Beats us! Crack Brokers Software Scam Review Scam Exposed We are not only industry with expert liars, but also people who influence the identities of people and sell us unreal trading information. If you watch the video, you will notice that some traders who gave their testimonials and endorsed Crack Brokers Software you will notice that the developer Thomas Mallon is nothing but a Fiverr artist who is paid to say anything. He will say whatever thing to get paid. He actually gets paid $5 per fifty words. Thomas Muller claims that user of this software will be earning $2500 every day and later you see a title that says ‘’REGISTER YOUR ACCOUNT AND START MAKING $22005 EVRY DAY.’’ Thomas is puzzling people sine on the presentation he claims its $2500 and the title says $220005. Which is it? Our Comment Crack Brokers Software Scam Review Don’t fall for this Crack Brokers Software scam. There are certainly real and tested apps that make real and realistic amounts of money. These apps have been used by binary trading expert who have years of trading knowledge. This is not a genuine and real app and the guideline establishment should look into. We have no other option but to flag Crack Brokers Software AS a SCAM that should be completely ignored. http://www.bestbinaryoptionsrobots.com
Fantasy Stock Pro Review - Ryan Harper's new day trading software strategies Is is Scam or best penny stocks listing
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