//+------------------------------------------------------------------+
//|                                                        WMACD.mq4 |
//|                                                 Copyright © 2011 |
//+------------------------------------------------------------------+
#property  copyright "Copyright © 2011"
//---- indicator settings
#property indicator_separate_window
#property indicator_buffers 6
#property indicator_color1 Black
#property indicator_color2 Green
#property indicator_color3 Maroon
#property indicator_color4 LightSkyBlue
#property indicator_color5 DarkKhaki
#property indicator_color6 DarkKhaki

#property indicator_width1 2
#property indicator_width2 2
#property indicator_width3 2
#property indicator_width4 1
#property indicator_width5 1
#property indicator_width6 1

extern int S_MA=26;
extern int F_MA=12;
extern int SMA=9;
extern double Dvn=1.0;
extern int Price=0;
extern int Mode=1;

//---- indicator buffers
double     MacdBuffer0[];
double     MacdBuffer1[];
double     MacdBuffer2[];
double     SignalBuffer[];
double     EnvUpBuffer[];
double     EnvDnBuffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
   //---- drawing settings
   SetIndexStyle(0,DRAW_NONE);
   SetIndexStyle(1,DRAW_HISTOGRAM,STYLE_SOLID,2);
   SetIndexStyle(2,DRAW_HISTOGRAM,STYLE_SOLID,2);
   SetIndexStyle(3,DRAW_LINE,STYLE_SOLID,1);
   SetIndexStyle(4,DRAW_LINE,STYLE_DOT,1);
   SetIndexStyle(5,DRAW_LINE,STYLE_DOT,1);
   SetIndexDrawBegin(0,S_MA);
   SetIndexDrawBegin(1,S_MA);
   SetIndexDrawBegin(2,S_MA);
   SetIndexDrawBegin(3,S_MA);
   SetIndexDrawBegin(4,S_MA);
   SetIndexDrawBegin(5,S_MA);
   SetIndexBuffer(0,MacdBuffer0);
   SetIndexBuffer(1,MacdBuffer1);
   SetIndexBuffer(2,MacdBuffer2);
   SetIndexBuffer(3,SignalBuffer);
   SetIndexBuffer(4,EnvUpBuffer);
   SetIndexBuffer(5,EnvDnBuffer);
   IndicatorDigits(Digits+1);
   if(Dvn<0.1) Dvn=0.1;
   if(Dvn>100.0) Dvn=100.0;
//---- name for DataWindow and indicator subwindow label
   IndicatorShortName("WMACD("+S_MA+","+F_MA+","+SMA+")");
   SetIndexLabel(1,"MACD");
   SetIndexLabel(2,"MACD");
   SetIndexLabel(3,"Signal");
   SetIndexLabel(4,"EnvUp("+Dvn+")");
   SetIndexLabel(5,"EnvDn("+Dvn+")");
//---- initialization done
   return(0);
  }
//+------------------------------------------------------------------+
//| Moving Averages Convergence/Divergence                           |
//+------------------------------------------------------------------+
int start()
  {
   double prev,current;
  
   int counted_bars = IndicatorCounted();
   if(counted_bars < 0)  return(-1);
   if(counted_bars > 0)   counted_bars--;
   int limit = Bars - counted_bars;
   if(counted_bars==0) limit-=1+1;
      
//---- macd
   for(int i=0; i<limit; i++)
      MacdBuffer0[i]=iMA(NULL,0,F_MA,0,Mode,Price,i)-iMA(NULL,0,S_MA,0,Mode,Price,i);
//---- signal line counted in the 2-nd buffer
   for(i=0; i<limit; i++)
      SignalBuffer[i]=iMAOnArray(MacdBuffer0,WHOLE_ARRAY,SMA,0,MODE_SMA,i);
//---- envelopes line counted     
   for(i=0; i<limit; i++)
      EnvUpBuffer[i] =((0+ iMA(NULL,0,S_MA,0,Mode,Price,i))/100)*Dvn;
   for(i=0; i<limit; i++)
      EnvDnBuffer[i] =((0- iMA(NULL,0,S_MA,0,Mode,Price,i))/100)*Dvn;
//---- done
//---- dispatch values between 2 buffers

   bool up=true;
   for(i=limit-1; i>=0; i--)
     {
      current=MacdBuffer0[i];
      prev=MacdBuffer0[i+1];
      if(current>prev) up=true;
      if(current<prev) up=false;
      if(!up)
        {
         MacdBuffer2[i]=current;
         MacdBuffer1[i]=0.0;
        }
      else
        {
         MacdBuffer1[i]=current;
         MacdBuffer2[i]=0.0;
        }
     }
//---- done
   return(0);
  }
//+------------------------------------------------------------------+