Trailing Stop

I need a Trailing Stop that is based on the highest high or the lowest low after the order is opened. 

For the long trade, I need the trailing stop to move the stop loss price to the highest high price after the order is opened minus the 2 Average True Range. For the long trade, if the bar that the trade is entered is the highest bar (the system usually enters a trade at the opening of the bar) after the trade is entered, the trailing stop should include the bar that the trade is entered.  As for short trade, I need the trailing stop to move the stop loss price to the lowest low price after the order is opened plus the 2 Average True Range. For the short trade. if the bar that the trade is entered is the lowest bar (the system usually enters a trade at the opening of the bar) after the trade is entered, the trailing stop should include the bar that the trade is entered. 

To make this trailing stop more flexible, I need you to make number of ATRs as an input as well. 

The function should include the code attached. 

void AdjustTrail()
{

//buy order section
   for(int b=OrdersTotal()-1;b>=0;b--)
                {
      if(OrderSelect(b,SELECT_BY_POS,MODE_TRADES))
         if(OrderMagicNumber()==MagicNumber)
            if(OrderSymbol()==Symbol())
               if(OrderType()==OP_BUY)
                   if(OrderStopLoss()< B_ATRStop)
                        {                                                                                               OrderModifyResult=OrderModify(OrderTicket(),OrderOpenPrice(),BATRStop,OrderTakeProfit(),0,Orange);
                        }
                }

for(int s=OrdersTotal()-1;s>=0;s--)
                {
      if(OrderSelect(s,SELECT_BY_POS,MODE_TRADES))
         if(OrderMagicNumber()==MagicNumber)
            if(OrderSymbol()==Symbol())
               if(OrderType()==OP_SELL)
                  if(OrderStopLoss()> S_ATRStop)
                        {                                                                       OrderModifyResult=OrderModify(OrderTicket(),OrderOpenPrice(),SATRStop,OrderTakeProfit(),0,Orange);
                        };
                }

If there is an error code in sending the order, the function should be able to resend the order 3 times with a 1sec pause in between.