Trade once in one time
before order execution you can check OrdersTotal()>0
however if you are using some other variables (magic number, symbol) then you should make a function that will count orders with specified property (symbol, magic number, order type etc)
It's work. Thank you.
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How to make code for mql 4 to buy/sell just once time?
Because in my ea, it makes open/buy many times in one time.