For securities, the definition of margin includes three important concepts: the Margin Loan, the Margin Deposit and the Margin Requirement. The Margin Loan is the amount of money that an investor borrows from his broker to buy securities. The Margin Deposit is the amount of equity contributed by the investor toward the purchase of securities in a margin account. The Margin Requirement is the minimum amount that a customer must deposit and it is commonly expressed as a percent of the current market value. The Margin Deposit can be greater than or equal to the Margin Requirement. We can express this as an equation:


tweet at 3:44pm: [RTRS] - U.S. CDC DIRECTOR REDFIELD SAYS RISK TO U.S. PUBLIC FROM CORONAVIRUS OUTBREAK IS LOW tweet at 3:46pm: REDFIELD SAYS THERE ARE 191 INDIVIDUALS UNDER INVESTIGATION IN U.S. AMID CORONAVIRUS OUTBREAK tweet at 3:45pm: US CDC Director Redfield: This is a significant global situation. https://t.co/Ao1Ci2OEfi tweet at 3:52pm: US declares the coronavirus a public health emergency, implementing special temporary measures $SPX
The "philosophy" of the forex trading system, as with the rest of the QuantStart site, is to try and mimic real-life trading as much as possible in our backtesting. This means including the details that are often excluded from more "research oriented" backtesting situations. Latency, server outages, automation, monitoring, realistic transaction costs will all be included within the models to give us a good idea of how well a strategy is likely to perform.
Whether you have assets in a securities account or in a futures account, your assets are protected by U.S. federal regulations governing how brokers must protect your property and funds. In the securities account, your assets are protected by SEC and SIPC rules. In the futures account, your assets are protected by CFTC rules requiring segregation of customer funds. You are also protected by our strong financial position and our conservative risk management philosophy. See our Strength & Security page.
Unit Tests for Position/Portfolio - While I've not mentioned it directly in diary entries #1 and #2, I've actually been writing some unit tests for the Portfolio and Position objects. Since these are so crucial to the calculations of the strategy, one must be extremely confident that they perform as expected. An additional benefit of such tests is that they allow the underlying calculation to be modified, such that if all tests still pass, we can be confident that the overall system will continue to behave as expected.
Margin requirements for futures and futures options are established by each exchange through a calculation algorithm known as SPAN margining. SPAN (Standard Portfolio Analysis of Risk) evaluates overall portfolio risk by calculating the worst possible loss that a portfolio of derivative and physical instruments might reasonably incur over a specified time period (typically one trading day.) This is done by computing the gains and losses that the portfolio would incur under different market conditions. The most important part of the SPAN methodology is the SPAN risk array, a set of numeric values that indicate how a particular contract will gain or lose value under various conditions. Each condition is called a risk scenario. The numeric value for each risk scenario represents the gain or loss that that particular contract will experience for a particular combination of price (or underlying price) change, volatility change, and decrease in time to expiration.

How can you avoid this unanticipated surprise? Margin calls can be effectively avoided by carefully monitoring your account balance on a regular basis, and by using stop-loss orders on every position to minimise the risk. Another smart action to consider is to implement risk management within your trading. By managing your the potential risks effectively, you will be more aware of them, and you should also be able to anticipate them and potentially avoid them altogether.


All currency trading is done in pairs. Unlike the stock market, where you can buy or sell a single stock, you have to buy one currency and sell another currency in the forex market. Next, nearly all currencies are priced out to the fourth decimal point. A pip or percentage in point is the smallest increment of trade. One pip typically equals 1/100 of 1 percent.
Multiple Broker/FIX Integration - At the moment we are strongly coupled to the OANDA broker. As I said this is simply because I came across their API and found it to be a modern offering. There are plenty of other brokers out there, many of which support the FIX protocol. Adding a FIX capability would increase the number of brokers that could be used with the system.
tweet at 3:44pm: [RTRS] - U.S. CDC DIRECTOR REDFIELD SAYS RISK TO U.S. PUBLIC FROM CORONAVIRUS OUTBREAK IS LOW tweet at 3:46pm: REDFIELD SAYS THERE ARE 191 INDIVIDUALS UNDER INVESTIGATION IN U.S. AMID CORONAVIRUS OUTBREAK tweet at 3:45pm: US CDC Director Redfield: This is a significant global situation. https://t.co/Ao1Ci2OEfi tweet at 3:52pm: US declares the coronavirus a public health emergency, implementing special temporary measures $SPX
Let’s cover this with an example. If you have $1,000 in your trading account and use a leverage of 1:100 you could theoretically open a position size of $100,000. However, by doing so, your entire trading account would be allocated as the required margin for the trade, and even a single price tick against you would lead to a margin call. There would be no free margin to withstand any negative price fluctuation.
Trading on margin is extremely popular among retail Forex traders. It allows you to open a much larger position than your initial trading account would otherwise allow, by allocating only a small portion of your trading account as the margin, or collateral for the trade. Trading on margin also carries certain risks, as both your profits and losses are magnified.
In particular I've made the interface for beginning a new backtest a lot simpler by encapsulating a lot of the "boilerplate" code into a new Backtest class. I've also modified the system to be fully workable with multiple currency pairs. In this article I'll describe the new interface and show the usual Moving Average Crossover example on both GBP/USD and EUR/USD.

The script is currently hardcoded to generate forex data for the entire month of January 2014. It uses the Python calendar library in order to ascertain business days (although I haven't excluded holidays yet) and then generates a set of files of the form BBBQQQ_YYYYMMDD.csv, where BBBQQQ will be the specified currency pair (e.g. GBPUSD) and YYYYMMDD is the specified date (e.g. 20140112).
Options involve risk and are not suitable for all investors. For more information read the "Characteristics and Risks of Standardized Options". For a copy call Interactive Brokers' Client Services on 312-542-6901. Before trading, clients must read the relevant risk disclosure statements on our Warnings and Disclosures page - http://www.interactivebrokers.com/disclosures. Trading on margin is only for sophisticated investors with high risk tolerance. You may lose more than your initial investment. For additional information regarding margin loan rates, see http://www.interactivebrokers.com/interest. Security futures involve a high degree of risk and are not suitable for all investors. The amount you may lose may be greater than your initial investment. Before trading security futures, read the Security Futures Risk Disclosure Statement. For a copy visit http://www.interactivebrokers.com/disclosures. Structured products and fixed income products such as bonds are complex products that are more risky and are not suitable for all investors. Before trading, please read the Risk warning and Disclosure Statement at http://www.interactivebrokers.com/disclosures. There is a substantial risk of loss in foreign exchange trading. The settlement date of foreign exchange trades can vary due to time zone differences and bank holidays. When trading across foreign exchange markets, this may necessitate borrowing funds to settle foreign exchange trades. The interest rate on borrowed funds must be considered when computing the cost of trades across multiple markets.
Why should you use Learn to Trade to learn Forex trading? That’s simple: we are a credible, well-established organisation that exists to educate people on Forex trading strategies. Our Forex trading training is second to none and will give you the foundation you need to achieve success in the high-opportunity world of currency trading. Every course is supported by our knowledgeable team of experts, who guide and support you throughout your learning experience. Not only that – you’ll get to take advantage of our live trading floor to get some hands-on experience. Getting a feel for what it’s like, while you have experienced traders around to help you, is a valuable opportunity that will help you get the confidence you need. Register now for your Forex trading tutorial and workshop!
Monitoring and High Availability - Since we are considering a high-frequency intraday system, we must put comprehensive monitoring and high availability redundancy in place. This means reporting on CPU usage, disk usage, network I/O, latency and checking that any periodic scripts are set to keep running. In addition we need a backup and restore strategy. Ask yourself what backup plans you would have in place if you had large open positions, in a volatile market, and your server suddenly died. Believe me, it happens!
Is a member of the Investment Industry Regulatory Organization of Canada (IIROC) and Member - Canadian Investor Protection Fund. Know Your Advisor: View the IIROC AdvisorReport. Trading of securities and derivatives may involve a high degree of risk and investors should be prepared for the risk of losing their entire investment and losing further amounts. Interactive Brokers Canada Inc. is an execution-only dealer and does not provide investment advice or recommendations regarding the purchase or sale of any securities or derivatives.
You could ask yourself, why wouldn’t you use the highest leverage ratio available in order to decrease your margin requirements and get an extremely high market exposure? The answer is rather simple and deals with Forex risk management. While leverage magnifies your potential profits, it also magnifies your potential losses. Trading on high leverage increases your risk in trading.
Is a member of the Investment Industry Regulatory Organization of Canada (IIROC) and Member - Canadian Investor Protection Fund. Know Your Advisor: View the IIROC AdvisorReport. Trading of securities and derivatives may involve a high degree of risk and investors should be prepared for the risk of losing their entire investment and losing further amounts. Interactive Brokers Canada Inc. is an execution-only dealer and does not provide investment advice or recommendations regarding the purchase or sale of any securities or derivatives.
Free Margin – Your free margin represents your total equity minus any margin used for leveraged trades. For example, if your equity is $1,000 and your used margin is $100, your free margin would amount to $900. Following your free margin is extremely important, as it is used to withstand negative price fluctuations from your open trades and to open new leveraged trades. It’s important to understand that your free margin increases with profitable positions, but decreases with your losing positions. Once the free margin drops to zero or below, your broker will activate the so-called margin call and close all your open positions at the current market rate, in order to prevent your equity from falling below the required margin.

(Note that the leverage shown in Trades 2 and 3 is available for Professional clients only. A Professional client is a client who possesses the experience, knowledge and expertise to make their own investment decisions and properly assess the risks that these incur. In order to be considered to be Professional client, the client must comply with MiFID ll 2014/65/EU Annex ll requirements.)
Trading on margin can be a profitable Forex strategy, but it is important to understand all the possible risks. You should make sure you know how your margin account operates, and be sure to read the margin agreement between you and your selected broker. If there is anything you are unclear about in your agreement, ask questions and make sure everything is clear.
Let’s cover this with an example. If you have $1,000 in your trading account and use a leverage of 1:100 you could theoretically open a position size of $100,000. However, by doing so, your entire trading account would be allocated as the required margin for the trade, and even a single price tick against you would lead to a margin call. There would be no free margin to withstand any negative price fluctuation.
Free Margin – Your free margin represents your total equity minus any margin used for leveraged trades. For example, if your equity is $1,000 and your used margin is $100, your free margin would amount to $900. Following your free margin is extremely important, as it is used to withstand negative price fluctuations from your open trades and to open new leveraged trades. It’s important to understand that your free margin increases with profitable positions, but decreases with your losing positions. Once the free margin drops to zero or below, your broker will activate the so-called margin call and close all your open positions at the current market rate, in order to prevent your equity from falling below the required margin.
If you sell a security short, you must have sufficient equity in your account to cover any fees associated with borrowing the security. If you borrow the security through us, we will borrow the security on your behalf and your account must have sufficient collateral to cover the margin requirements of the short sale. To cover administrative fees and stock borrowing fees, we must post 102% of the value of the security borrowed as collateral with the lender. In instances in which the security shorted is hard to borrow, borrowing fees charged by the lender may be so high (greater than the interest earned) that the short seller must pay additional interest for the privilege of borrowing a security. Customers may view the indicative short stock interest rates for a specific stock through the Short Stock (SLB) Availability tool located in the Tools section of their Account Management page. For more information concerning shorting stocks and associated fees, visit our Stock Shorting page.
×