//+------------------------------------------------------------------+
//|                                            Heiken Ashi Ma T3.mq4 |
//+------------------------------------------------------------------+
//|                                                      mod by Raff |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, Forex-TSD.com "
#property link      "http://www.forex-tsd.com/"

#property indicator_chart_window
#property indicator_buffers 6
#property indicator_color1 Red
#property indicator_color2 CadetBlue
#property indicator_color3 Red
#property indicator_color4 CadetBlue
#property indicator_color5 Yellow
#property indicator_color6 Aqua
#property indicator_width1 1
#property indicator_width2 1
#property indicator_width3 2
#property indicator_width4 2
#property indicator_width5 1
#property indicator_width6 1

//---- parameters
extern int MaPeriod = 3;
extern int MaMetod  = 3;
extern int Step = 1;
extern int CountBars = 1500;
extern bool UseT3 = false;
extern double b = 0.618;
extern bool Alerts = false;

//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
double ExtMapBuffer4[];
double UpArrow[];
double DnArrow[];

//----
double e1,e2,e3,e4,e5,e6;
double c1,c2,c3,c4;
double n,w1,w2,b2,b3;
//----
int ExtCountedBars=0;
static bool TurnedUp = false;
static bool TurnedDown = false;  
datetime timeprev=0;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//|------------------------------------------------------------------|
int init()
  {
//---- indicators
   IndicatorBuffers(6);
   SetIndexStyle(0,DRAW_HISTOGRAM);
   SetIndexBuffer(0, ExtMapBuffer1);
   SetIndexStyle(1,DRAW_HISTOGRAM);
   SetIndexBuffer(1, ExtMapBuffer2);
   SetIndexStyle(2,DRAW_HISTOGRAM);
   SetIndexBuffer(2, ExtMapBuffer3);
   SetIndexStyle(3,DRAW_HISTOGRAM);
   SetIndexBuffer(3, ExtMapBuffer4);
   SetIndexBuffer(4, UpArrow);
   SetIndexStyle(4,DRAW_ARROW);
   SetIndexArrow(4,233);
   SetIndexBuffer(5,DnArrow);
   SetIndexStyle(5,DRAW_ARROW);
   SetIndexArrow(5,234);


//---- indicator buffers mapping
   SetIndexBuffer(0,ExtMapBuffer1);
   SetIndexBuffer(1,ExtMapBuffer2);
   SetIndexBuffer(2,ExtMapBuffer3);
   SetIndexBuffer(3,ExtMapBuffer4);
   SetIndexBuffer(4,UpArrow);
   SetIndexBuffer(5,DnArrow);

//---- variable reset
    e1=0; e2=0; e3=0; e4=0; e5=0; e6=0;
    c1=0; c2=0; c3=0; c4=0; 
    n=0; 
    w1=0; w2=0; 
    b2=0; b3=0;

    b2=b*b;
    b3=b2*b;
    c1=-b3;
    c2=(3*(b2+b3));
    c3=-3*(2*b2+b+b3);
    c4=(1+3*b+b3+3*b2);
    n=MaPeriod;

    if (n<1) n=1;
    n = 1 + 0.5*(n-1);
    w1 = 2 / (n + 1);
    w2 = 1 - w1;
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   if(timeprev<iTime(NULL,0,0)) {TurnedDown = false; TurnedUp = false;timeprev=iTime(NULL,0,0);}

   if (CountBars>Bars-1) CountBars=Bars-1;
   double maOpen, maClose, maLow, maHigh;
   double haOpen, haHigh, haLow, haClose;
   if(Bars<=10) return(0);
   //ExtCountedBars=IndicatorCounted();
//---- check for possible errors
   //if (ExtCountedBars<0) return(-1);
//---- last counted bar will be recounted
   //if (ExtCountedBars>0) ExtCountedBars--;

   int pos=CountBars;//-ExtCountedBars-1;
   while(pos>=0)
     {
    if (UseT3)
    {
      maOpen=CalcT3(Open[pos]);
      maClose=CalcT3(Close[pos]);
      maLow=CalcT3(Low[pos]);
      maHigh=CalcT3(High[pos]);
    }
    else
    if (!UseT3)
    {
      maOpen=iMA(NULL,0,MaPeriod,0,MaMetod,PRICE_OPEN,pos);
      maClose=iMA(NULL,0,MaPeriod,0,MaMetod,PRICE_CLOSE,pos);
      maLow=iMA(NULL,0,MaPeriod,0,MaMetod,MODE_LOW,pos);
      maHigh=iMA(NULL,0,MaPeriod,0,MaMetod,MODE_HIGH,pos);
    }
     
      haClose=(maOpen+maHigh+maLow+maClose)/4;
      //haClose=(maOpen+maClose)/2+(((maClose-maOpen)/(maHigh-maLow))*MathAbs((maClose-maOpen)/2));      
      haOpen=(ExtMapBuffer3[pos+1]+ExtMapBuffer4[pos+1])/2;
      haHigh=MathMax(maHigh, MathMax(haOpen, haClose));
      haLow=MathMin(maLow, MathMin(haOpen, haClose));
      
      if (haOpen<haClose) 
        {
         ExtMapBuffer1[pos]=haLow;
         ExtMapBuffer2[pos]=haHigh;
        } 
      else
        {
         ExtMapBuffer1[pos]=haHigh;
         ExtMapBuffer2[pos]=haLow;
        } 
      ExtMapBuffer3[pos]=haOpen;
      ExtMapBuffer4[pos]=haClose;
      if (Step>0) if( MathAbs(ExtMapBuffer1[pos]-ExtMapBuffer1[pos+1]) < Step*Point ) ExtMapBuffer1[pos]=ExtMapBuffer1[pos+1];
      if (Step>0) if( MathAbs(ExtMapBuffer2[pos]-ExtMapBuffer2[pos+1]) < Step*Point ) ExtMapBuffer2[pos]=ExtMapBuffer2[pos+1];
      if (Step>0) if( MathAbs(ExtMapBuffer3[pos]-ExtMapBuffer3[pos+1]) < Step*Point ) ExtMapBuffer3[pos]=ExtMapBuffer3[pos+1];
      if (Step>0) if( MathAbs(ExtMapBuffer4[pos]-ExtMapBuffer4[pos+1]) < Step*Point ) ExtMapBuffer4[pos]=ExtMapBuffer4[pos+1];

    if (Alerts==true)
    {
        UpArrow[pos]=EMPTY_VALUE; DnArrow[pos]=EMPTY_VALUE;

        if (ExtMapBuffer3[pos]<ExtMapBuffer4[pos] && ExtMapBuffer4[pos+1]<ExtMapBuffer3[pos+1])
        { 
           UpArrow[pos]=ExtMapBuffer4[pos+1]-(Ask-Bid);
           if (UpArrow[0]!=EMPTY_VALUE && TurnedUp==false)
           {  
              Alert("HAMa  BUY:  ",Symbol()," - ",Period(),"  at  ", Close[0],"  -  ", TimeToStr(CurTime(),TIME_SECONDS));
              TurnedDown = false;
              TurnedUp = true;
           }
        }
        if (ExtMapBuffer3[pos]>ExtMapBuffer4[pos] && ExtMapBuffer4[pos+1]>ExtMapBuffer3[pos+1])
        { 
           DnArrow[pos]=ExtMapBuffer4[pos+1]+(Ask-Bid);
           if (DnArrow[0]!=EMPTY_VALUE && TurnedDown==false)
           {
              Alert("HAMa SELL:  ",Symbol()," - ",Period(),"  at  ", Close[0],"  -  ", TimeToStr(CurTime(),TIME_SECONDS));
              TurnedUp = false;
              TurnedDown = true;
           }
        }
    }

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

double CalcT3(double CalcPrice)
{
      e1 = w1*CalcPrice+w2*e1;
      e2 = w1*e1 + w2*e2;
      e3 = w1*e2 + w2*e3;
      e4 = w1*e3 + w2*e4;
      e5 = w1*e4 + w2*e5;
      e6 = w1*e5 + w2*e6;
      double T3=c1*e6 + c2*e5 + c3*e4 + c4*e3;
      return(T3);
}
//+------------------------------------------------------------------+