MQL4参考 交易函数 OrderSymbol
Returns symbol name of the currently selected order.
string OrderSymbol();
Returned value
The symbol name of the currently selected order.
Note
The order must be previously selected by the OrderSelect() function.
Example:
if(OrderSelect(12, SELECT_BY_POS)==true) Print("symbol of order #", OrderTicket(), " is ", OrderSymbol()); else Print("OrderSelect failed error code is",GetLastError());