//---- indicator settings
#property  indicator_separate_window
#property  indicator_buffers 3
#property  indicator_color1  Silver
#property  indicator_color2  Red
#property  indicator_color3  Blue
#property  indicator_width1  2
//---- indicator parameters
extern int FastEMA=12;
extern int SlowEMA=26;
extern int SignalSMA=9;
//---- indicator buffers
double     MacdBuffer[];
double     SignalBuffer[];
double     HistoBuffer[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- drawing settings
   SetIndexStyle(0,DRAW_NONE);
   SetIndexStyle(1,DRAW_NONE);
   SetIndexStyle(2,DRAW_HISTOGRAM,EMPTY,3);
   SetIndexDrawBegin(1,SignalSMA);
   IndicatorDigits(Digits+1);
//---- indicator buffers mapping
   SetIndexBuffer(0,MacdBuffer);
   SetIndexBuffer(1,SignalBuffer);
   SetIndexBuffer(2,HistoBuffer);
//---- name for DataWindow and indicator subwindow label
   IndicatorShortName("MACD("+FastEMA+","+SlowEMA+","+SignalSMA+")    !! :)");
   SetIndexLabel(0,"MACD YO");
   SetIndexLabel(1,"Signal YO");
   SetIndexLabel(2,"H I S T O :):)");
//---- initialization done
   return(0);
  }
//+------------------------------------------------------------------+
//| Moving Averages Convergence/Divergence                           |
//+------------------------------------------------------------------+
int start()
  {
   int limit;
   int counted_bars=IndicatorCounted();
//---- last counted bar will be recounted
   if(counted_bars>0) counted_bars--;
   limit=Bars-counted_bars;
//---- macd counted in the 1-st buffer
   for(int i=0; i<limit; i++)
      MacdBuffer[i]=iMA(NULL,0,FastEMA,0,MODE_EMA,PRICE_CLOSE,i)-iMA(NULL,0,SlowEMA,0,MODE_EMA,PRICE_CLOSE,i);
//---- signal line counted in the 2-nd buffer
   for(i=0; i<limit; i++)
      SignalBuffer[i]=iMAOnArray(MacdBuffer,Bars,SignalSMA,0,MODE_SMA,i);
//---- histogram line counted in the 3-nd buffer
   for(i=0; i<limit; i++)
      HistoBuffer[i]=MacdBuffer[i]-SignalBuffer[i];
//---- done
   return(0);
  }
//+------------------------------------------------------------------+