//+------------------------------------------------------------------+
//|                                                        GMACD.mq4 |
//|                                    Copyright 2012, Guriev Invest |
//|                                   http://www.gurievinvest.org.ua |
//+------------------------------------------------------------------+
#property copyright "Copyright 2012, Guriev Invest"
#property link      "http://www.gurievinvest.org.ua"

#property indicator_separate_window
#property indicator_buffers 4
#property indicator_color1 Blue
#property indicator_color2 Red
#property indicator_color3 Red
#property indicator_color4 Green
#property indicator_style2 STYLE_DOT
#property indicator_width3 3
#property indicator_width4 3

//=====Параметры индикатора=====
extern int FastMA    = 12;
extern int SlowMA    = 26;
extern int SignalMA  = 9;

//=====Буферы индикатора=====
double MacdBufferRed[];
double MacdBufferGreen[];
double SignalBuffer[];
double LineBuffer[];
//+------------------------------------------------------------------+
//| Инициализация                                                    |
//+------------------------------------------------------------------+
int init()
  {
   SetIndexStyle(0,DRAW_LINE);
   SetIndexStyle(1,DRAW_LINE);
   SetIndexStyle(2,DRAW_HISTOGRAM);
   SetIndexStyle(3,DRAW_HISTOGRAM);
   SetIndexDrawBegin(0,SlowMA);
   SetIndexDrawBegin(1,SlowMA+SignalMA);
   SetIndexDrawBegin(2,SlowMA+SignalMA);
   SetIndexDrawBegin(3,SlowMA+SignalMA);
   IndicatorDigits(Digits+1);

   SetIndexBuffer(0,LineBuffer);
   SetIndexBuffer(1,SignalBuffer);
   SetIndexBuffer(2,MacdBufferRed);
   SetIndexBuffer(3,MacdBufferGreen);

   IndicatorShortName("MACD("+FastMA+","+SlowMA+","+SignalMA+")");
   SetIndexLabel(0,"Line");
   SetIndexLabel(1,"Signal");
   SetIndexLabel(2,"MACD");
   SetIndexLabel(3,"MACD");
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int limit;
   double volFirst   = 0;
   double volSecond  = 0;

   int counted_bars=IndicatorCounted();
   if(counted_bars<0) return(-1);
   if(counted_bars>0) counted_bars--;
   limit=Bars-counted_bars;
   if(counted_bars==0) limit-=1+1;

//=====Подсчет первой средней
   for(int i=0; i<limit; i++)
      LineBuffer[i]=iMA(NULL,0,FastMA,0,MODE_EMA,PRICE_CLOSE,i)-iMA(NULL,0,SlowMA,0,MODE_EMA,PRICE_CLOSE,i);

   for(i=0; i<limit; i++)
     {
      MacdBufferRed[i]  = 0.0;
      MacdBufferGreen[i]= 0.0;

      SignalBuffer[i]   = iMAOnArray(LineBuffer,Bars,SignalMA,0,MODE_SMA,i);
      volFirst          = LineBuffer[i]-SignalBuffer[i];
      volSecond         = LineBuffer[i+1]-SignalBuffer[i];
      if(volFirst>volSecond) MacdBufferRed[i]=volFirst;
      else MacdBufferGreen[i]=volFirst;
     }

   return(0);
  }
//+------------------------------------------------------------------+