The functuion automatically calculates the lot size from the specified percent of free assets (х%) or uses the fixed lot size ("х" without "%" sign).
We add the function #include <Lot_Volume.mqh> to the program and call it in the necessary place: OrderSend(Symbol, Order Type, Lot_Volume(), Price, 0, Stop, Profit);
If you specify "10%", for example, then the size of the lot will be equal to 10% of free assets, and if you specify just "10" then the size will be equal to 10 lots.
Certainly, the library is not perfect, I wait for your comments.
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/8556
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