Let us first write a simple expert, for which the signal to open a position willīe when the MACD indicator meets zero line. 'own' positions without paying attention to positions opened manually Now let us solve the specific task: create an expert that could work only with its This way is not the unique one, but the easiest. In all three cases, the MagicNumber is used to solve it. The assisting expert must modify only those positions having MagicNumberĪll three examples are quite realistic, and the users could probably have set such Solution: The trading experts must use unique MagicNumbers and manage only 'their' May modify only positions opened manually, but not those opened by other experts. The assisting expert that realizes Trailing Stop Task: Trading experts must work according to their algorithms and may not do anything Trailing Stop are operating in the client terminal simultaneously. Inįuture, they must manage only positions, the MagicNumber of which is equal to theĮxample 3: Several experts, a human trader and an assisting expert realizing a non-standard Solution: Each expert must use its unique non-zero MagicNumber when opening positions. Task: The expert must manage only 'their' orders. In future, it must manage only positions, the MagicNumber of which is equal toĮxample 2: Two experts with different algorithms are trading in the client terminal at the Solution: The expert must assign a unique, non-zero MagicNumber to the position being opened. Task: The expert must trade according to its algorithm and may not do anything with positions When trading manually, but it is really unexpendable when trading using an expertĮxample 1: A human trader and an expert are trading in the client terminal at the same time. There is no use (or even possibility) applying this feature

This number will consequently be used to distinguish theĪbove order from others. I.e., when an order is being placed (a position is being opened), one can assignĪ unique number to it. Int OrderSend( string symbol, int cmd, double volume, double price, int slippage, double stoploss,ĭouble takeprofit, string comment=NULL, int magic=0, datetime expiration=0, color arrow_color=CLR_NONE)

Mt4 magic numbers