//+------------------------------------------------------------------+
//|                                                       TMA+CG.mq4 |
//|                                                           mladen |
//| arrowse coded acording to idea presented by rajiv                |
//+------------------------------------------------------------------+
#property copyright "rajivxxx"
#property link      "rajivxxx@gmail.com"

#property description "edited by eevviill"
#property description "no repaint"

#property indicator_chart_window
#property indicator_buffers 7
#property indicator_color1  DimGray
#property indicator_color2  Maroon
#property indicator_color3  DarkBlue
#property indicator_color4  Red
#property indicator_color5  Blue
#property indicator_style1  STYLE_DOT

extern int    TimeFrame       = 0;
extern int    HalfLength      = 56;
extern int    Price           = PRICE_WEIGHTED;
extern double BandsDeviations = 1.5;
extern bool   Interpolate     = true;
extern bool   alertsOn        = false;
extern bool   alertsOnCurrent = false;
extern bool   alertsOnHighLow = false;
extern bool   alertsMessage   = false;
extern bool   alertsSound     = false;
extern bool   alertsEmail     = false;

double tmBuffer[];
double upBuffer[];
double dnBuffer[];
double wuBuffer[];
double wdBuffer[];
double upArrow[];
double dnArrow[];

string IndicatorFileName;
bool   calculatingTma = false;
bool   returningBars  = false;
int    timeFrame;
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int init()
  {
   timeFrame  = stringToTimeFrame(TimeFrame);
   HalfLength = MathMax(HalfLength,1);
   SetIndexBuffer(0,tmBuffer);
   SetIndexDrawBegin(0,HalfLength);
   SetIndexBuffer(1,upBuffer);
   SetIndexDrawBegin(1,HalfLength);
   SetIndexBuffer(2,dnBuffer);
   SetIndexDrawBegin(2,HalfLength);
   SetIndexBuffer(3,dnArrow);
   SetIndexStyle(3,DRAW_ARROW);
   SetIndexArrow(5,242);
   SetIndexBuffer(4,upArrow);
   SetIndexStyle(4,DRAW_ARROW);
   SetIndexArrow(6,241);
   SetIndexBuffer(5,wuBuffer);
   SetIndexBuffer(6,wdBuffer);

   if(TimeFrame==1)
     {
      calculatingTma=true;
      return(0);
     }
   if(TimeFrame==2)
     {
      returningBars=true;
      return(0);
     }


   IndicatorFileName = WindowExpertName();
   return(0);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int deinit() { return(0); }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int start()
  {
   int counted_bars=IndicatorCounted();
   int i,limit;

   if(counted_bars<0)
      return(-1);
   if(counted_bars>0)
      counted_bars--;
   limit=MathMin(Bars-1,Bars-counted_bars+HalfLength);

   if(returningBars)
     {
      tmBuffer[0] = limit;
      return(0);
     }
   if(calculatingTma)
     {
      calculateTma(limit);
      return(0);
     }
   if(timeFrame > Period())
      limit = MathMax(limit,MathMin(Bars-1,iCustom(NULL,timeFrame,IndicatorFileName,2,0,0)*timeFrame/Period()));

   if(limit<Bars-20)
      limit=1;
   for(i = limit; i >= 0; i--)
     {

      int      shift1 = iBarShift(NULL,timeFrame,Time[i]);
      datetime time1  = iTime(NULL,timeFrame,shift1);

      tmBuffer[i] = iCustom(NULL,timeFrame,IndicatorFileName,1,HalfLength,Price,BandsDeviations,0,shift1);
      upBuffer[i] = iCustom(NULL,timeFrame,IndicatorFileName,1,HalfLength,Price,BandsDeviations,1,shift1);
      dnBuffer[i] = iCustom(NULL,timeFrame,IndicatorFileName,1,HalfLength,Price,BandsDeviations,2,shift1);

      upArrow[i] = EMPTY_VALUE;
      dnArrow[i] = EMPTY_VALUE;
      if(High[i+1]>upBuffer[i+1] && Close[i+1]>Open[i+1] && Close[i]<Open[i])
         upArrow[i] = High[i]+iATR(NULL,0,20,i);
      if(Low[i+1]<dnBuffer[i+1] && Close[i+1]<Open[i+1] && Close[i]>Open[i])
         dnArrow[i] = High[i]-iATR(NULL,0,20,i);

      if(timeFrame <= Period() || shift1==iBarShift(NULL,timeFrame,Time[i-1]))
         continue;
      if(!Interpolate)
         continue;

      for(int n = 1; i+n < Bars && Time[i+n] >= time1; n++)
         continue;
      double factor = 1.0 / n;
      for(int k = 1; k < n; k++)
        {
         tmBuffer[i+k] = k*factor*tmBuffer[i+n] + (1.0-k*factor)*tmBuffer[i];
         upBuffer[i+k] = k*factor*upBuffer[i+n] + (1.0-k*factor)*upBuffer[i];
         dnBuffer[i+k] = k*factor*dnBuffer[i+n] + (1.0-k*factor)*dnBuffer[i];
        }
     }

   if(alertsOn)
     {
      if(alertsOnCurrent)
         int forBar = 0;
      else
         forBar = 1;
      if(alertsOnHighLow)
        {
         if(High[forBar] > upBuffer[forBar] && High[forBar+1] < upBuffer[forBar+1])
            doAlert("high penetrated upper bar");
         if(Low[forBar]  < dnBuffer[forBar] && Low[forBar+1]  > dnBuffer[forBar+1])
            doAlert("low penetrated lower bar");
        }
      else
        {
         if(Close[forBar] > upBuffer[forBar] && Close[forBar+1] < upBuffer[forBar+1])
            doAlert("close penetrated upper bar");
         if(Close[forBar] < dnBuffer[forBar] && Close[forBar+1] > dnBuffer[forBar+1])
            doAlert("close penetrated lower bar");
        }
     }

   return(0);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void calculateTma(int limit)
  {
   int i,j,k;
   double FullLength = 2.0*HalfLength+1.0;
   for(i=limit; i>=0; i--)
     {
      double sum  = (HalfLength+1)*iMA(NULL,0,1,0,MODE_SMA,Price,i);
      double sumw = (HalfLength+1);
      for(j=1, k=HalfLength; j<=HalfLength; j++, k--)
        {
         sum  += k*iMA(NULL,0,1,0,MODE_SMA,Price,i+j);
         sumw += k;

         if(j<=i)
           {
            sum  += k*iMA(NULL,0,1,0,MODE_SMA,Price,i-j);
            sumw += k;
           }
        }
      tmBuffer[i] = sum/sumw;

      double diff = iMA(NULL,0,1,0,MODE_SMA,Price,i)-tmBuffer[i];
      if(i> (Bars-HalfLength-1))
         continue;
      if(i==(Bars-HalfLength-1))
        {
         upBuffer[i] = tmBuffer[i];
         dnBuffer[i] = tmBuffer[i];
         if(diff>=0)
           {
            wuBuffer[i] = MathPow(diff,2);
            wdBuffer[i] = 0;
           }
         else
           {
            wdBuffer[i] = MathPow(diff,2);
            wuBuffer[i] = 0;
           }
         continue;
        }

      if(diff>=0)
        {
         wuBuffer[i] = (wuBuffer[i+1]*(FullLength-1)+MathPow(diff,2))/FullLength;
         wdBuffer[i] =  wdBuffer[i+1]*(FullLength-1)/FullLength;
        }
      else
        {
         wdBuffer[i] = (wdBuffer[i+1]*(FullLength-1)+MathPow(diff,2))/FullLength;
         wuBuffer[i] =  wuBuffer[i+1]*(FullLength-1)/FullLength;
        }
      upBuffer[i] = tmBuffer[i] + BandsDeviations*MathSqrt(wuBuffer[i]);
      dnBuffer[i] = tmBuffer[i] - BandsDeviations*MathSqrt(wdBuffer[i]);
     }
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void doAlert(string doWhat)
  {
   static string   previousAlert="";
   static datetime previousTime;
   string message;
   if(previousAlert!=doWhat || previousTime!=Time[0])
     {
      previousAlert = doWhat;
      previousTime  = Time[0];

      message= StringConcatenate(Symbol()," at ",TimeToStr(TimeLocal(),TIME_SECONDS)," THA : ",doWhat);
      if(alertsMessage)
         Alert(message);
      if(alertsEmail)
         SendMail(StringConcatenate(Symbol(),"TMA "),message);
      if(alertsSound)
         PlaySound("alert2.wav");
     }
  }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int stringToTimeFrame(string tfs)
  {
   for(int l = StringLen(tfs)-1; l >= 0; l--)
     {
      int tchar = StringGetChar(tfs,l);
      if((tchar > 96 && tchar < 123) || (tchar > 223 && tchar < 256))
         tfs = StringSetChar(tfs, 1, tchar - 32);
      else
         if(tchar > -33 && tchar < 0)
            tfs = StringSetChar(tfs, 1, tchar + 224);
     }
   int tf=0;
   if(tfs=="M1" || tfs=="1")
      tf=PERIOD_M1;
   if(tfs=="M5" || tfs=="5")
      tf=PERIOD_M5;
   if(tfs=="M15"|| tfs=="15")
      tf=PERIOD_M15;
   if(tfs=="M30"|| tfs=="30")
      tf=PERIOD_M30;
   if(tfs=="H1" || tfs=="60")
      tf=PERIOD_H1;
   if(tfs=="H4" || tfs=="240")
      tf=PERIOD_H4;
   if(tfs=="D1" || tfs=="1440")
      tf=PERIOD_D1;
   if(tfs=="W1" || tfs=="10080")
      tf=PERIOD_W1;
   if(tfs=="MN" || tfs=="43200")
      tf=PERIOD_MN1;
   if(tf==0 || tf<Period())
      tf=Period();
   return(tf);
  } 
//+------------------------------------------------------------------+