//+------------------------------------------------------------------+
//|                                            Heiken Ashi Ma T3.mq4 |
//+------------------------------------------------------------------+
//|                                                      mod by Raff |
//|                                               2009 mod by mladen |
//|  tools copied and pasted alerts from another HA indy so blame me |
//+------------------------------------------------------------------+
#property copyright "Copyright � 2008,Forex-TSD.com"
#property link      "http://www.forex-tsd.com/"

#property indicator_chart_window
#property indicator_buffers 6
#property indicator_color1 clrSandyBrown
#property indicator_color2 clrDeepSkyBlue
#property indicator_color3 clrSandyBrown
#property indicator_color4 clrDeepSkyBlue
#property indicator_color5 clrDeepSkyBlue
#property indicator_color6 clrSandyBrown
#property indicator_width1 1
#property indicator_width2 1
#property indicator_width3 2
#property indicator_width4 2
#property indicator_width5 1
#property indicator_width6 1

//
//
//
//
//

extern string TimeFrame        = "Current time frame";
extern int    MaPeriod         = 10;
extern int    MaMetod          = 2;
extern int    Step             = 1;
extern bool   BetterFormula    = false;
extern bool   T3Average        = true;
extern double T3Hot            = 0.618;
extern bool   T3Original       = false;
extern bool   ShowArrows       = true;

extern string _                = "Alerts settings";
extern bool   alertsOn         = true;
extern bool   alertsOnCurrent  = true;
extern bool   alertsMessage    = true;
extern bool   alertsSound      = false;
extern bool   alertsEmail      = false;

//
//
//
//
//

double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
double ExtMapBuffer4[];
double UpArrow[];
double DnArrow[];

//
//
//
//
//

double emas[][24];
double alpha;
double c1;
double c2;
double c3;
double c4;

//
//
//
//
//

string indicatorFileName;
bool   calculateValue;
bool   returnBars;
int    timeFrame;

//+------------------------------------------------------------------+
//|                                                                  |
//|------------------------------------------------------------------|
//
//
//
//
//

int init()
{
   SetIndexBuffer(0,ExtMapBuffer1); SetIndexStyle(0,DRAW_HISTOGRAM);
   SetIndexBuffer(1,ExtMapBuffer2); SetIndexStyle(1,DRAW_HISTOGRAM);
   SetIndexBuffer(2,ExtMapBuffer3); SetIndexStyle(2,DRAW_HISTOGRAM);
   SetIndexBuffer(3,ExtMapBuffer4); SetIndexStyle(3,DRAW_HISTOGRAM);
   SetIndexBuffer(4,UpArrow); 
   SetIndexBuffer(5,DnArrow); 
   
   if (ShowArrows)
   {
      SetIndexStyle(4,DRAW_ARROW);  SetIndexArrow(4,233);     
      SetIndexStyle(5,DRAW_ARROW);  SetIndexArrow(5,234);     
   }
   else
   {
      SetIndexStyle(4,DRAW_NONE);       
      SetIndexStyle(5,DRAW_NONE);       
   }


   //
   //
   //
   //
   //
   
      double a  = T3Hot;
             c1 = -a*a*a;
             c2 =  3*(a*a+a*a*a);
             c3 = -3*(2*a*a+a+a*a*a);
             c4 = 1+3*a+a*a*a+3*a*a;

      MaPeriod = MathMax(1,MaPeriod);
      if (T3Original)
           alpha = 2.0/(1.0 + MaPeriod);
      else alpha = 2.0/(2.0 + (MaPeriod-1.0)/2.0);
      
   //
   //
   //
   //
   //
      
   indicatorFileName = WindowExpertName();
   calculateValue    = (TimeFrame=="calculateValue"); if (calculateValue) return(0);
   returnBars        = (TimeFrame=="returnBars");     if (returnBars)     return(0);
   timeFrame         = stringToTimeFrame(TimeFrame);
      
   //
   //
   //
   //
   //

   return(0);
}

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//
//
//
//
//

int start()
{
   double maOpen, maClose, maLow, maHigh;
   double haOpen, haClose, haLow, haHigh;
   int    counted_bars=IndicatorCounted();
   int    pointModifier;
   int    limit;

   //
   //
   //
   //
   //
   if(counted_bars<0) return(-1);
   if(counted_bars>0) counted_bars--;
         limit=MathMin(Bars-counted_bars,Bars-1);
         if (ArrayRange(emas,0) != Bars) ArrayResize(emas,Bars);
         if (returnBars)  { ExtMapBuffer1[0] = limit+1; return(0); }
         
         if (Digits==3 || Digits==5)
               pointModifier = 10;
         else  pointModifier = 1;   
   
   //
   //
   //
   //
   //
   
   if (calculateValue || timeFrame == Period())
   {          
          
   //
   //
   //
   //
   //
   
   for(int pos=limit; pos >= 0; pos--)
   {
      if (T3Average)
         {
            maOpen  = iT3(Open[pos] ,pos, 0);
            maClose = iT3(Close[pos],pos, 6);
            maLow   = iT3(Low[pos]  ,pos,12);
            maHigh  = iT3(High[pos] ,pos,18);
         }
      else
         {
            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,PRICE_LOW  ,pos);
            maHigh  = iMA(NULL,0,MaPeriod,0,MaMetod,PRICE_HIGH ,pos);
         }
   
      //
      //
      //
      //
      //
        
         if (BetterFormula) {
               if (maHigh!=maLow)
                     haClose = (maOpen+maClose)/2+(((maClose-maOpen)/(maHigh-maLow))*MathAbs((maClose-maOpen)/2));
               else  haClose = (maOpen+maClose)/2; }
         else        haClose = (maOpen+maHigh+maLow+maClose)/4;
                     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*pointModifier*Point ) ExtMapBuffer1[pos]=ExtMapBuffer1[pos+1];
         if( MathAbs(ExtMapBuffer2[pos]-ExtMapBuffer2[pos+1]) < Step*pointModifier*Point ) ExtMapBuffer2[pos]=ExtMapBuffer2[pos+1];
         if( MathAbs(ExtMapBuffer3[pos]-ExtMapBuffer3[pos+1]) < Step*pointModifier*Point ) ExtMapBuffer3[pos]=ExtMapBuffer3[pos+1];
         if( MathAbs(ExtMapBuffer4[pos]-ExtMapBuffer4[pos+1]) < Step*pointModifier*Point ) ExtMapBuffer4[pos]=ExtMapBuffer4[pos+1];
      } 
              
      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 (ExtMapBuffer3[pos]>ExtMapBuffer4[pos] && ExtMapBuffer4[pos+1]>ExtMapBuffer3[pos+1]) DnArrow[pos]=ExtMapBuffer4[pos+1]+(Ask-Bid);
   }
    
   //
   //
   //
   //
   //
         
    manageAlerts();
    return(0);
    }
    
    //
   //
   //
   //
   //
   
   limit = MathMax(limit,MathMin(Bars,iCustom(NULL,timeFrame,indicatorFileName,"returnBars",0,0)*timeFrame/Period()));
   
   for(pos = limit; pos >= 0; pos--)
   {
   
     int y = iBarShift(NULL,timeFrame,Time[pos]);
  
       ExtMapBuffer1[pos] = iCustom(NULL,timeFrame,indicatorFileName,"calculateValue",MaPeriod,MaMetod,Step,BetterFormula,T3Average,T3Hot,T3Original,0,y);
       ExtMapBuffer2[pos] = iCustom(NULL,timeFrame,indicatorFileName,"calculateValue",MaPeriod,MaMetod,Step,BetterFormula,T3Average,T3Hot,T3Original,1,y);
       ExtMapBuffer3[pos] = iCustom(NULL,timeFrame,indicatorFileName,"calculateValue",MaPeriod,MaMetod,Step,BetterFormula,T3Average,T3Hot,T3Original,2,y);
       ExtMapBuffer4[pos] = iCustom(NULL,timeFrame,indicatorFileName,"calculateValue",MaPeriod,MaMetod,Step,BetterFormula,T3Average,T3Hot,T3Original,3,y);
       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 (ExtMapBuffer3[pos]>ExtMapBuffer4[pos] && ExtMapBuffer4[pos+1]>ExtMapBuffer3[pos+1]) DnArrow[pos]=ExtMapBuffer4[pos+1]+(Ask-Bid);
   }
    
      manageAlerts();
   return(0);
 }

//
//
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+

void manageAlerts()
{
   if (!calculateValue && alertsOn)
   {
      if (alertsOnCurrent)
           int whichBar = 0;
      else     whichBar = 1; whichBar = iBarShift(NULL,0,iTime(NULL,timeFrame,whichBar));
      
      if (UpArrow[whichBar]!= EMPTY_VALUE) doAlert(whichBar,"HAma buy");   
      if (DnArrow[whichBar]!= EMPTY_VALUE) doAlert(whichBar,"HAma sell"); 
      
      }
   }
//
//
//
//
//

void doAlert(int forBar, string doWhat)
{
   static string   previousAlert="nothing";
   static datetime previousTime;
   string message;
   
   if (previousAlert != doWhat || previousTime != Time[forBar]) {
       previousAlert  = doWhat;
       previousTime   = Time[forBar];

       //
       //
       //
       //
       //

       message =  StringConcatenate(Symbol()," ",timeFrameToString(timeFrame)," at ",TimeToStr(TimeLocal(),TIME_SECONDS)," Heiken Ashi ",doWhat);
          if (alertsMessage) Alert(message);
          if (alertsEmail)   SendMail(StringConcatenate(Symbol()," Heiken Ashi "),message);
          if (alertsSound)   PlaySound("alert2.wav");
   }
}

//+-------------------------------------------------------------------
//|                                                                  
//+-------------------------------------------------------------------
//
//
//
//
//

string sTfTable[] = {"M1","M5","M15","M30","H1","H4","D1","W1","MN"};
int    iTfTable[] = {1,5,15,30,60,240,1440,10080,43200};

//
//
//
//
//

int stringToTimeFrame(string tfs)
{
   StringToUpper(tfs);
   for (int i=ArraySize(iTfTable)-1; i>=0; i--)
         if (tfs==sTfTable[i] || tfs==""+iTfTable[i]) return(MathMax(iTfTable[i],Period()));
                                                      return(Period());
}
string timeFrameToString(int tf)
{
   for (int i=ArraySize(iTfTable)-1; i>=0; i--) 
         if (tf==iTfTable[i]) return(sTfTable[i]);
                              return("");
}

//
//
//
//
//


double iT3(double price,int shift,int buffer)
{
   int i = Bars-shift-1;
   if (i < 1)
      {
         emas[i][0+buffer] = price;
         emas[i][1+buffer] = price;
         emas[i][2+buffer] = price;
         emas[i][3+buffer] = price;
         emas[i][4+buffer] = price;
         emas[i][5+buffer] = price;
      }
   else
      {
         emas[i][0+buffer] = emas[i-1][0+buffer]+alpha*(price            -emas[i-1][0+buffer]);
         emas[i][1+buffer] = emas[i-1][1+buffer]+alpha*(emas[i][0+buffer]-emas[i-1][1+buffer]);
         emas[i][2+buffer] = emas[i-1][2+buffer]+alpha*(emas[i][1+buffer]-emas[i-1][2+buffer]);
         emas[i][3+buffer] = emas[i-1][3+buffer]+alpha*(emas[i][2+buffer]-emas[i-1][3+buffer]);
         emas[i][4+buffer] = emas[i-1][4+buffer]+alpha*(emas[i][3+buffer]-emas[i-1][4+buffer]);
         emas[i][5+buffer] = emas[i-1][5+buffer]+alpha*(emas[i][4+buffer]-emas[i-1][5+buffer]);
      }
   return(c1*emas[i][5+buffer] + c2*emas[i][4+buffer] + c3*emas[i][3+buffer] + c4*emas[i][2+buffer]);
}