//+------------------------------------------------------------------+
//|                                            Heiken Ashi Ma T3.mq4 |
//+------------------------------------------------------------------+
//|                                                      mod by Raff |
//|                                               2009 mod by mladen |
//+------------------------------------------------------------------+
#property copyright "Copyright � 2008,Forex-TSD.com"
#property link      "http://www.forex-tsd.com/"

#property indicator_separate_window
#property indicator_buffers 6
#property indicator_color1 Red
#property indicator_color2 RoyalBlue
#property indicator_color3 Red
#property indicator_color4 RoyalBlue
#property indicator_color5 Aqua
#property indicator_color6 Magenta
#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          = 10;
extern bool   BetterFormula = false;
extern bool   T3Average     = true;
extern double T3Hot         = 0.618;
extern bool   T3Original    = false;
extern string BarsID        = "HA separate 1";
extern color  ColorUp       = RoyalBlue;
extern color  ColorDn       = Red;
extern int    widthWick     = 1;
extern int    widthBody     = 3;
extern bool   alertsOn         = false;
extern bool   alertsOnCurrent  = false;
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 indicatorName;
static bool TurnedUp   = false;
static bool TurnedDown = false;
datetime    timeprev   = 0;
int    window;

//
//
//
//
//

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

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

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


   //
   //
   //
   //
   //
   
      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);

   indicatorName=BarsID+" - "+" Heiken Ashi "+MaPeriod;
   IndicatorShortName(indicatorName);
   return(0);
}

//
//
//
//
//

int deinit()
{
   string lookFor       = BarsID+":";
   int    lookForLength = StringLen(lookFor);
   for (int i = ObjectsTotal(); i>= 0; i--)
   {
      string name = ObjectName(i);
      if (StringSubstr(name,0,lookForLength)==lookFor) ObjectDelete(name);
   }
   return (0);
}

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

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

   //
   //
   //
   //
   //

   if(counted_bars<0) return(-1);
   if(counted_bars>0) counted_bars--;
         limit = Bars-counted_bars;
         if (returnBars) { ExtMapBuffer1[0] = limit+1; return(0); }
         
         window = WindowFind(indicatorName);
          
   //
   //
   //
   //
   //
   
   if (calculateValue || timeFrame == Period())
   {
      if(timeprev<iTime(NULL,0,0)) {TurnedDown=false; TurnedUp=false;timeprev=iTime(NULL,0,0);}
      if (ArrayRange(emas,0) != Bars) ArrayResize(emas,Bars);
      if (Digits==3 || Digits==5)
            pointModifier = 10;
      else  pointModifier = 1;               
      
      //
      //
      //
      //
      //
      
      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];
         }         
         if (!calculateValue) drawBar(Time[pos],ExtMapBuffer1[pos],ExtMapBuffer2[pos],ExtMapBuffer3[pos],ExtMapBuffer4[pos]);
         UpArrow[pos]=EMPTY_VALUE;
         DnArrow[pos]=EMPTY_VALUE;
         if (ExtMapBuffer3[pos]<ExtMapBuffer4[pos] && ExtMapBuffer4[pos+1]<ExtMapBuffer3[pos+1]) UpArrow[pos]=ExtMapBuffer4[pos+1]-iATR(NULL,0,20,i)/2.0;
         if (ExtMapBuffer3[pos]>ExtMapBuffer4[pos] && ExtMapBuffer4[pos+1]>ExtMapBuffer3[pos+1]) DnArrow[pos]=ExtMapBuffer4[pos+1]+iATR(NULL,0,20,i)/2.0;
      }
      manageAlerts();
      return(0);
   }      
   
   //
   //
   //
   //
   //
   
   limit = MathMax(limit,MathMin(Bars,iCustom(NULL,timeFrame,indicatorFileName,"returnBars",0,0)*timeFrame/Period()));
   for (i=limit;i>=0;i--)
   {
      int y = iBarShift(NULL,timeFrame,Time[i]);
         ExtMapBuffer1[i] = iCustom(NULL,timeFrame,indicatorFileName,"CalculateValue",MaPeriod,MaMetod,Step,BetterFormula,T3Average,T3Hot,T3Original,0,y);
         ExtMapBuffer2[i] = iCustom(NULL,timeFrame,indicatorFileName,"CalculateValue",MaPeriod,MaMetod,Step,BetterFormula,T3Average,T3Hot,T3Original,1,y);
         ExtMapBuffer3[i] = iCustom(NULL,timeFrame,indicatorFileName,"CalculateValue",MaPeriod,MaMetod,Step,BetterFormula,T3Average,T3Hot,T3Original,2,y);
         ExtMapBuffer4[i] = iCustom(NULL,timeFrame,indicatorFileName,"CalculateValue",MaPeriod,MaMetod,Step,BetterFormula,T3Average,T3Hot,T3Original,3,y);
         drawBar(Time[i],ExtMapBuffer1[i],ExtMapBuffer2[i],ExtMapBuffer3[i],ExtMapBuffer4[i]);
            if (y!=iBarShift(NULL,timeFrame,Time[i+1]))
            {
               UpArrow[i] = iCustom(NULL,timeFrame,indicatorFileName,"CalculateValue",MaPeriod,MaMetod,Step,BetterFormula,T3Average,T3Hot,T3Original,4,y);
               DnArrow[i] = iCustom(NULL,timeFrame,indicatorFileName,"CalculateValue",MaPeriod,MaMetod,Step,BetterFormula,T3Average,T3Hot,T3Original,5,y);
            }
   }
   manageAlerts();
   
   //
   //
   //
   //
   //
      
   return(0);
}

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

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]);
}


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

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,"up");
      if (DnArrow[whichBar] != EMPTY_VALUE) doAlert(whichBar,"down");
   }
}

//
//
//
//
//

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()," at ",TimeToStr(TimeLocal(),TIME_SECONDS)," ",timeFrameToString(timeFrame)+" HAMA T3 trend changed to ",doWhat);
          if (alertsMessage) Alert(message);
          if (alertsEmail)   SendMail(StringConcatenate(Symbol(),"HAMA T3 trend "),message);
          if (alertsSound)   PlaySound("alert2.wav");
   }
}

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

void drawBar(int bTime, double prHigh, double prLow, double prOpen, double prClose)
{
   color wickColor = ColorUp; if (prHigh >prLow)  wickColor = ColorDn;
   color barColor  = ColorUp; if (prClose<prOpen) barColor  = ColorDn;
   string oName;
          oName = BarsID+":"+TimeToStr(bTime)+"w";
            if (ObjectFind(oName) < 0) ObjectCreate(oName,OBJ_TREND,window,bTime,0,bTime,0);
                 ObjectSet(oName, OBJPROP_PRICE1, prHigh);
                 ObjectSet(oName, OBJPROP_PRICE2, prLow);
                 ObjectSet(oName, OBJPROP_COLOR, wickColor);
                 ObjectSet(oName, OBJPROP_WIDTH, widthWick);
                 ObjectSet(oName, OBJPROP_RAY, false);
                 ObjectSet(oName, OBJPROP_BACK, true);
           
         oName = BarsID+":"+TimeToStr(bTime)+"b";
            if (ObjectFind(oName) < 0)ObjectCreate(oName,OBJ_TREND,window,bTime,0,bTime,0);
                 ObjectSet(oName, OBJPROP_PRICE1, prOpen);
                 ObjectSet(oName, OBJPROP_PRICE2, prClose);
                 ObjectSet(oName, OBJPROP_COLOR, barColor);
                 ObjectSet(oName, OBJPROP_WIDTH, widthBody);
                 ObjectSet(oName, OBJPROP_RAY, false);
                 ObjectSet(oName, OBJPROP_BACK, true);
}

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

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)
{
   tfs = stringUpperCase(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("");
}

//
//
//
//
//

string stringUpperCase(string str)
{
   string   s = str;

   for (int length=StringLen(str)-1; length>=0; length--)
   {
      int char = StringGetChar(s, length);
         if((char > 96 && char < 123) || (char > 223 && char < 256))
                     s = StringSetChar(s, length, char - 32);
         else if(char > -33 && char < 0)
                     s = StringSetChar(s, length, char + 224);
   }
   return(s);
}