//+------------------------------------------------------------------+
//|                                                           mc.mq4 |
//|                      Copyright © 2011, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2011, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net"

#property indicator_separate_window
#property indicator_buffers 4
#property indicator_color1 Gray
#property indicator_color2 White
#property indicator_color3 MediumBlue
#property indicator_color4 Aqua
#property indicator_width1  2

extern int FastEMA=12;
extern int SlowEMA=26;
extern int SignalSMA1=9;
extern int SignalSMA2=25;

//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
double ExtMapBuffer4[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   IndicatorShortName("MACD++ ("+FastEMA+","+SlowEMA+","+SignalSMA1+","+SignalSMA2+")");
   
   SetIndexStyle(0,DRAW_HISTOGRAM);
   SetIndexBuffer(0,ExtMapBuffer1);
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(1,ExtMapBuffer2);
   SetIndexStyle(2,DRAW_LINE);
   SetIndexBuffer(2,ExtMapBuffer3);
   SetIndexStyle(3,DRAW_HISTOGRAM);
   SetIndexBuffer(3,ExtMapBuffer4);
   //SetIndexEmptyValue(2,0.0);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//----
   
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int    counted_bars=IndicatorCounted();
   int limit;
   
//---- 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++)
      ExtMapBuffer1[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++){
      ExtMapBuffer2[i]=iMAOnArray(ExtMapBuffer1,Bars,SignalSMA1,0,MODE_SMA,i);
      ExtMapBuffer3[i]=iMAOnArray(ExtMapBuffer1,Bars,SignalSMA2,0,MODE_SMA,i);
      ExtMapBuffer4[i]=ExtMapBuffer2[i]-ExtMapBuffer3[i];
}
 
   
//----
   
//----
   return(0);
  }
//+------------------------------------------------------------------+