why pending orders doesn't adjusted in mql4? error: the price doesnt declared. here is the mql4 code

Question

/这里我保存了最后一个订单的开盘价在操作参数。/

double op = OrderOpenPrice();

int ticket = SendOrder(_symbol,OP_SELLSTOP,0.02,op -0.0020,100, 0,0);

Answer 1

如果您尝试更改现有订单，您应该使用 OrderSelect() and OrderModify()。