//+------------------------------------------------------------------+
//| 1MA Expert                               |
//+------------------------------------------------------------------+
#property copyright "Ron Thompson"
#property link      "http://www.lightpatch.com/forex"

// User Input
extern double Lots = 0.1;
extern double MovingAvg = 10;

// make sure to leave this unset.
// It will will trigger the 1st buy by being
// different than Time[0]
int prevTime;


//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//|------------------------------------------------------------------|

int init()
  {
   return(0);
  }


//+------------------------------------------------------------------+
//| Custor indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
   return(0);
  }


//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+

int start()
  {
   double   cMA=0, pMA=0;
   double   p=Point();
      
   bool     found=false;
   bool    rising=false;
   bool   falling=false;
   bool    bought=false;
   bool      sold=false;

   int      cnt=0;
   int      err=0;
   
   int      rty=0;
   

   // Only compute right after each bar move
   if(prevTime==Time[0]) {return(0);}
   prevTime=Time[0];

   // Error checking
   if(Bars<100)                        {Print("Bars less than 100"); return(0);}
   if(AccountFreeMargin()<(1000*Lots)) {Print("We have no money");   return(0);}

   // PRICE_OPEN is the only stable price point for Bar0
   cMA=iMA(Symbol(), 0, MovingAvg, 0, MODE_LWMA, PRICE_OPEN, 0);
   pMA=iMA(Symbol(), 0, MovingAvg, 0, MODE_LWMA, PRICE_OPEN, 1);

   // is the MA rising or falling (N-pip filter)
   // filter affects close AND buy transactions
   if (pMA+(p*1.1)<cMA) {rising=true;  falling=false;}
   if (pMA-(p*1.1)>cMA) {rising=false; falling=true;}

   // Does the Symbol() have an open order
   for(cnt=0;cnt<OrdersTotal();cnt++)
     {
      OrderSelect(cnt, SELECT_BY_POS, MODE_TRADES);
      if(OrderSymbol()==Symbol())
        {
         // yes, set found, get the existing bought/sold state
         // and then break, so there's only 1 order per symbol
         found=true;
         if (OrderType()==0) {bought=true;  sold=false;}
         if (OrderType()==1) {bought=false; sold=true;}
         break;
        }
         else
        {
         found=false;
        }        
     }
   

   //Print("1.1 pMA=",pMA," cMA=",cMA,"    R=",rising,"B=",bought,"   F=",falling,"S=",sold,"    $=",Close[0]," Time=",Time[0]);


   // If there is no order, then
   // place one based on MA direction
   if (!found && rising)
     {
      OrderSend(Symbol(),OP_BUY,Lots,Ask,3,Ask-(p*13),Ask+(p*15),"1MA Buy",11123,0,White);
      if(GetLastError()==0)
        {
         Print(Symbol()," OPEN Buy success:",Ask);
        }
         else
        {
         Print(Symbol()," OPEN Buy Error ", err, " Time=",Time[0]);
        }
      return(0);
     }

   if (!found && falling)
     {
      OrderSend(Symbol(),OP_SELL,Lots,Bid,3,Bid+(p*13),Bid-(p*15),"1MA Sell",11321,0,Red);
      if(GetLastError()==0)
        {
         Print(Symbol()," OPEN Sell success:",Bid);
        }
         else
        {
         Print(Symbol()," OPEN Sell Error ", err, " Time=",Time[0]);
        }
      return(0);
     }


   // if the direction changed, then close the order

   if (rising && sold)       //existing sell
     {
      // Try 10 times to close, reporting each time
      for (rty=1; rty<=10; rty++)
        {
         OrderClose(OrderTicket(),Lots,Ask,0,Red);
         if(GetLastError()==0)
           {
            Print(Symbol()," CLOSE SELL success:",Ask);
            break;
           }
            else
           {
            Print(Symbol()," CLOSE Sell Error=", err, " LOOP=",rty, " Time=",Time[0]);
            Sleep(10000);
           }
        }
     }
   if (falling && bought)  // existing buy
     {
      // Try 10 times to close, reporting each time
      for (rty=1; rty<=10; rty++)
        {
         OrderClose(OrderTicket(),Lots,Bid,0,White);
         if(GetLastError()==0)
           {
            Print(Symbol()," CLOSE BUY success:",Bid);
            break;
           }
            else
           {
            Print(Symbol()," CLOSE Buy Error=", err, " LOOP=",rty, " Time=",Time[0]);
            Sleep(10000);
           }
        }
     }

   return(0);
  }