orders or set the value in percentage from the free margin. All opened market orders are closed either by a stop order or after a criterion of opening an order in opposite direction triggers (here criterion of closing Buy coincides with that of opening Sell and vice versa). Analyzing errors that may occur in the execution of trade operation allows, on the one side, to repeat a trade request and, on the other hand, to inform a user about a possible conflict situation. In this block some general parameters can be analyzed. return; / Exit start / / Orders accounting SymbSymbol / Security name Total0; / Amount of orders for(int i1; i OrdersTotal i) / Loop through orders if / If there is the next one / Analyzing orders: if (OrderSymbol!Symb)continue; / Another security if (OrderType 1). If there are no contraindicatons of a general character, control is passed to order accounting block. If any of criteria calculated earlier points to the necessity of opening an order of a certain type, a trade request to open an order is formed in this block. It is easy to understand why in the offered scheme the block of closing orders is executed earlier than the block of opening orders.
Generally, it is correct to be guided by the desire to have as little orders as possible. At a new start of the function start on a new tick the value of a certain variable-flag prohibiting trading (in this case enabled as a result of a critical error) can be analyzed and control can be passed for the termination of the special. Accounting orders The described Expert Advisor allows working only with one market order. Ttea will do the rest.
It is always more reasonable to process first existing orders (close or modify) and only after that to open new orders. This is a step by step guide to currency trading, but you can jump around using the left navigation bar. For convenience, the program part responsible for the calculation of trading criteria should be written in a separate block. If Sell is opened at A and closed at B, such trading will bring losses. In further strategy modifications we will have to change come program lines containing part of logics contained in the source strategy. 113 shows the market period when a strong movement resulted in the continuation of the price change in the same direction. Calculating Trading Criteria In the analyzed example definition of trading criteria (block 5-6) is calculated on the bases of difference between Moving Averages with different periods of averaging. For example, if there are not enough bars in a window (bars necessary for calculating parameters of technical indicators an EA will not be able to operate adequately.
The simplest of them is using a constant, fixed lot size. A trading Expert Advisor must necessarily contain error processing block. However, with the wide spread access to the internet, firms now offer the ability to open accounts and trade currencies to almost anyone. At the same time the algorithm of a program is to a great extent formed. On the basis of this analysis we can easily conclude that the described simple Expert Advisor is not perfect.