int ord;
if (C2<MA2 && C1>MA1) //Trend change from down to up.
   {
      int total = OrdersTotal(); //Script to close all open orders.
     
      for(int i=total-1;i>=0;i--)
      {
        OrderSelect(i, SELECT_BY_POS);
        if(OrderSymbol()==Simbol()&& OrderType()==1)
       {
 result = OrderClose( OrderTicket(), OrderLots(), MarketInfo(OrderSymbol(), MODE_ASK), 5, Red );
            
        if(result == false)
        {
          Alert("Order " , OrderTicket() , " failed to close. Error:" , GetLastError() );
          Sleep(3000);
        }  
        } 
        if(OrderSymbol()==Simbol()&& OrderType()==0)ord++;
        
        }
      int ticket; //Place Buy Order
         RefreshRates();
         if(ord==0)ticket=OrderSend(Symbol(),OP_BUY,Lots,Ask,3,Ask-1000*Point,Ask+1000*Point,"Buy Order",9999,0,Green);
         if(ticket<0)
           {
            Print("Buy Order failed with error #",GetLastError());
           }
    return;
   }
 
 //---------------------------------------------------------
 
   }