Should you have a position that is subject to an additional margin requirement we will contact you to make arrangements to cover it. This increased margin requirement will continue to apply at FOREX.com’s discretion, until the position size decreases and remains materially below the threshold for a sustained period. Partially closing the position will not automatically reduce your margin requirement.

A Portfolio Margin account can provide lower margin requirements than a Margin account. However, for a portfolio with concentrated risk, the requirements under Portfolio Margin may be greater than those under Margin, as the true economic risk behind the portfolio may not be adequately accounted for under the static Reg T calculations used for Margin accounts. Customers can compare their current Reg T margin requirements for their portfolio with those current projected under Portfolio Margin rules by clicking the Try PM button from the Account Window in Trader Workstation (demo or customer account).
Forex margin is a good faith deposit that a trader puts up as collateral to initiate a trade. Essentially, it is the minimum amount that a trader needs in the trading account to open a new position. This is usually communicated as a percentage of the notional value (trade size) of the forex trade. The difference between the deposit and the full value of the trade is “borrowed” from the broker.

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Should you have a position that is subject to an additional margin requirement we will contact you to make arrangements to cover it. This increased margin requirement will continue to apply at FOREX.com’s discretion, until the position size decreases and remains materially below the threshold for a sustained period. Partially closing the position will not automatically reduce your margin requirement.
In particular I would like to make the system a lot faster, since it will allow parameter searches to be carried out in a reasonable time. While Python is a great tool, it's one drawback is that it is relatively slow when compared to C/C++. Hence I will be carrying out a lot of profiling to try and improve the execution speed of both the backtest and the performance calculations.
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