How can I reset my stoploss to -8 pips,just after loss reachs -15 pips.

I mean for example my original stoploss is 20 pips.but if it reaches 15 pip I want it to set 8.........like trailing stop.

modifying stop loss..

-20...................

-18 => -11

-17 => -10

-16 => -9

-15 => -8

negative trailingstop is -7 for example.it reachs 17 I dont want to wait till it became positive or it comes -20.

ı dont know much about coding also.dont know how to use void comand..

here is original.trailing.and also I didnt understand "breakeven" in code.

//BreakEven routine
    if (BreakEven>0) {
      if ((pBid-OrderOpenPrice())>BreakEven*pp) {
         if ((OrderStopLoss()-OrderOpenPrice())<0) {
            ModifyStopLoss(OrderOpenPrice()+0*pp);
         }   
      }    
    }
    
    if (TrailingStop>0) {
    if ((pBid-OrderOpenPrice())>TrailingStop*pp) {
      if (OrderStopLoss()<pBid-(TrailingStop+TrailingStep-1)*pp) {
        ModifyStopLoss(pBid-TrailingStop*pp);
        return;
      }
    }
    }
 
  }
  if (OrderType()==OP_SELL) {
    pAsk = MarketInfo(OrderSymbol(), MODE_ASK);
 
    if (BreakEven>0) {
      if ((OrderOpenPrice()-pAsk)>BreakEven*pp) {
         if ((OrderOpenPrice()-OrderStopLoss())<0) {
            ModifyStopLoss(OrderOpenPrice()-0*pp);
          }
       }
    }
 
    if (TrailingStop>0) {
    if (OrderOpenPrice()-pAsk>TrailingStop*pp) {
      if (OrderStopLoss()>pAsk+(TrailingStop+TrailingStep-1)*pp || OrderStopLoss()==0) {
        ModifyStopLoss(pAsk+TrailingStop*pp);
        return;
      }
    }
    }
 

void Skip_SL_to_openprice()
{
if(Use_skip_SL_to_open_price == true)
{
OrderSelect(ticket,SELECT_BY_TICKET);

//BUY order: if price is above skip level -> SL = OrderOpenPrice
    if (OrderType() == OP_BUY && Bid > OrderOpenPrice()+Skip_SL_to_Open_price*Point)
     {
      SL = OrderOpenPrice();
      Alert("SL is set to open Price: ",SL);
     }
//SELL order: if price is below skip level -> SL = OrderOpenPrice
     if (OrderType() == OP_SELL && Ask < OrderOpenPrice()-Skip_SL_to_Open_price*Point)  
     {
      SL = OrderOpenPrice();  
      Alert("SL is set to open Price: ",SL);
     } 
}     
}    

Ah I see . . . you have bad data . . . download new data and import it.

Read this article carefully, it will help: http://www.jeremywhittaker.com/2010/12/28/setting-up-metatrader-for-better-backtesting-quality/