求問各位大神，mql4的EA中，如何壹次性對所有的多單或者空單掛壹個統壹的止損？比如我開了10筆多

if(use_sl_and_tp && total()>1)

{

double s_l, t_p;

for(i=0; i<OrdersTotal(); i++)

{

OrderSelect(i,SELECT_BY_POS,MODE_TRADES);

if(OrderSymbol()!=Symbol() || OrderMagicNumber()!=magic || OrderType()>1) continue;

type=OrderType();

s_l=OrderStopLoss();

t_p=OrderTakeProfit();

}

for(i=OrdersTotal()-1; i>=0; i--)

{

OrderSelect(i,SELECT_BY_POS,MODE_TRADES);

if(OrderSymbol()!=Symbol() || OrderMagicNumber()!=magic || OrderType()>1) continue;

if(OrderType()==type)

{

if(OrderStopLoss()!=s_l || OrderTakeProfit()!=t_p)

{

OrderModify(OrderTicket(),OrderOpenPrice(),s_l,t_p,0,CLR_NONE);

}

}

}

}