统计持仓订单中多单数量

该函数统计持仓订单中多单数量，过滤条件：货币、订单识别码、订单类型。可以自行修改过滤条件。

1. int CountLongs(string a_symbol_0, int a_magic_8) {
   
2. int l_count_12 = 0;
   
3. for (int l_pos_16 = OrdersTotal() - 1; l_pos_16 >= 0; l_pos_16--) {
   
4. OrderSelect(l_pos_16, SELECT_BY_POS, MODE_TRADES);
   
5. if (OrderSymbol() == a_symbol_0) {
   
6. if (OrderMagicNumber() == a_magic_8)
   
7. if (OrderType() == OP_BUY) l_count_12++;
   
8. }
   
9. }
   
10. return (l_count_12);
    
11. }

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