//+------------------------------------------------------------------+
//|                                         EMA-Crossover_Signal.mq4 |
//|         Copyright © 2005, Jason Robinson (jnrtrading)            |
//|                   http://www.jnrtading.co.uk                     |
//+------------------------------------------------------------------+


#property indicator_chart_window
#property indicator_buffers 4
#property indicator_color1 Lime
#property indicator_color2 Red
#property indicator_width1 2
#property indicator_width2 2
double CrossUp[];
double CrossDown[];
extern int FastMA =   15;
extern ENUM_MA_METHOD FasterMode = MODE_EMA; //0=sma, 1=ema, 2=smma, 3=lwma
extern ENUM_APPLIED_PRICE FasterPrice =  PRICE_CLOSE ;

extern int SlowMA =   60;
extern ENUM_MA_METHOD SlowerMode = MODE_EMA; //0=sma, 1=ema, 2=smma, 3=lwma
extern ENUM_APPLIED_PRICE SlowerPrice =   PRICE_CLOSE;

extern string sound = "";
extern string soundup = "expert.wav";
extern string sounddown = "stops.wav";
extern string alert = "";

 double alertTag;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   SetIndexStyle(0, DRAW_ARROW);
   SetIndexArrow(0, 167);
   SetIndexBuffer(0, CrossUp);

   SetIndexStyle(1, DRAW_ARROW);
   SetIndexArrow(1, 167);
   SetIndexBuffer(1, CrossDown);

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

//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start() {
   
   int limit, i, counter;
   double fasterMAnow, slowerMAnow, fasterMAprevious, slowerMAprevious, fasterMAafter, slowerMAafter;
   double Range, AvgRange;
   int counted_bars=IndicatorCounted();
   
   int ActivePer=Period();
   int SlowerMA=SlowMA/ActivePer;
   int FasterMA=FastMA/ActivePer;

//---- check for possible errors
   if(counted_bars<0) return(-1);

//---- last counted bar will be recounted
   if(counted_bars>0) counted_bars--;

   limit=Bars-counted_bars;
   
   for(i = 0; i <= limit; i++) {
   
      counter=i;
      Range=0;
      AvgRange=0;
      for (counter=i ;counter<=i+9;counter++)
      {
         AvgRange=AvgRange+MathAbs(High[counter]-Low[counter]);
      }
      Range=AvgRange/40;
       
      fasterMAnow =      iMA(NULL, 0, FasterMA, 0, FasterMode, FasterPrice, i);
      fasterMAprevious = iMA(NULL, 0, FasterMA, 0, FasterMode, FasterPrice, i+1);
      fasterMAafter =    iMA(NULL, 0, FasterMA, 0, FasterMode, FasterPrice, i-1);

      slowerMAnow =      iMA(NULL, 0, SlowerMA, 1, SlowerMode, SlowerPrice, i);
      slowerMAprevious = iMA(NULL, 0, SlowerMA, 1, SlowerMode, SlowerPrice, i+1);
      slowerMAafter =    iMA(NULL, 0, SlowerMA, 1, SlowerMode, SlowerPrice, i-1);
      
      if ( (fasterMAnow > slowerMAnow) && (fasterMAprevious < slowerMAprevious) && (fasterMAafter > slowerMAafter)) 
      {
         CrossUp[i] = Low[i] - Range;
         if ( alertTag!=Time[0])
         {
          //PlaySound("alert2.wav");// buy wav
          //Alert(Symbol(),"  M",Period()," MA cross BUY");
          if (soundup != "") PlaySound(soundup);
          else if (sound != "") PlaySound(sound);
          if (alert != "") Alert(Symbol(),"  M",Period()," MA cross BUY", alert);
         }
          alertTag = Time[0];
      }
      else if ((fasterMAnow < slowerMAnow) && (fasterMAprevious > slowerMAprevious) && (fasterMAafter < slowerMAafter)) 
      {
         CrossDown[i] = High[i] + Range;
         if ( alertTag!=Time[0])
         {
          //PlaySound("alert.wav"); //sell wav
          // Alert(Symbol(),"  M",Period()," MA cross SELL");
          if (sounddown != "") PlaySound(sounddown);
          else if (sound != "") PlaySound(sound);
          if (alert != "") Alert(Symbol(),"  M",Period()," MA cross SELL", alert);
         }
          alertTag = Time[0];
      }
      else 
      {
      
         CrossDown[i] = NULL;
         CrossUp[i] = NULL;
         
      
      }
   }
   return(0);
}