StepMA_Stoch_v3

//+------------------------------------------------------------------+
//|                                             StepMA_Stoch_KV1.mq4 |
//|                           Copyright © 2005, TrendLaboratory Ltd. |
//|                                       E-mail: igorad2004@list.ru |
//|                           modified by Kalenzo -> simone@konto.pl |
//|                           modified by raduga  21.04.2006         |
//|                           modified by Mandorr 02.09.2006         |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, TrendLaboratory Ltd."

#property indicator_separate_window
#property indicator_buffers 2
#property indicator_width1  2
#property indicator_width2  2
#property indicator_color1  Green
#property indicator_color2  Red
#property indicator_minimum -0.4
#property indicator_maximum 0.4

extern int    PeriodWATR=10;
extern double Kwatr=1;
extern int    HighLow=0;
extern int    NumberOfBarsToCalculate=300;

double BufferUp[];
double BufferDn[];


void init() {
   SetIndexStyle      (0, DRAW_HISTOGRAM, STYLE_SOLID, 2);
   SetIndexStyle      (1, DRAW_HISTOGRAM, STYLE_SOLID, 2);
   SetIndexBuffer     (0, BufferUp);
   SetIndexBuffer     (1, BufferDn);
   SetIndexLabel      (0, "Value");
   SetIndexLabel      (1, "Value");
   SetIndexDrawBegin  (0, PeriodWATR);
   SetIndexDrawBegin  (1, PeriodWATR);
   SetIndexEmptyValue (0,0);
   SetIndexEmptyValue (1,0);
   IndicatorDigits    (Digits);
   IndicatorShortName ("Step MA Stoch");
}


void start() {
   int    i,shift,TrendMin,TrendMax,TrendMid;
   double SminMin0,SmaxMin0,SminMin1,SmaxMin1,SumRange,dK,WATR0,WATRmax,WATRmin,WATRmid;
   double SminMax0,SmaxMax0,SminMax1,SmaxMax1,SminMid0,SmaxMid0,SminMid1,SmaxMid1;
   double linemin,linemax,linemid,Stoch1,Stoch2,bsmin,bsmax;
   double theDelta;
   double prev_y=0, prev_b=0;
   for (shift=NumberOfBarsToCalculate-1; shift>=0; shift--) {
	   SumRange=0;
	   Stoch1 = 0;
	   Stoch2 = 0;
	   for (i=PeriodWATR-1; i>=0; i--) {
         dK = 1+1.0*(PeriodWATR-i)/PeriodWATR;
         SumRange+= dK*(High[i+shift]-Low[i+shift]);
      }
      WATR0=SumRange/PeriodWATR;
      WATRmax=MathMax(WATR0,WATRmax);
      if (shift==NumberOfBarsToCalculate-1-PeriodWATR) WATRmin=WATR0;
      WATRmin=MathMin(WATR0,WATRmin);
      int StepSizeMin=MathRound(Kwatr*WATRmin/Point);
      int StepSizeMax=MathRound(Kwatr*WATRmax/Point);
      int StepSizeMid=MathRound(Kwatr*0.5*(WATRmax+WATRmin)/Point);
      if (HighLow>0) {
         SmaxMin0=Low[shift]+2*StepSizeMin*Point;
         SminMin0=High[shift]-2*StepSizeMin*Point;
         SmaxMax0=Low[shift]+2*StepSizeMax*Point;
         SminMax0=High[shift]-2*StepSizeMax*Point;
         SmaxMid0=Low[shift]+2*StepSizeMid*Point;
         SminMid0=High[shift]-2*StepSizeMid*Point;
         if (Close[shift]>SmaxMin1) TrendMin=1; 
         if (Close[shift]<SminMin1) TrendMin=-1;
         if (Close[shift]>SmaxMax1) TrendMax=1; 
         if (Close[shift]<SminMax1) TrendMax=-1;
         if (Close[shift]>SmaxMid1) TrendMid=1; 
         if (Close[shift]<SminMid1) TrendMid=-1;
      }
      if (HighLow == 0) {
         SmaxMin0=Close[shift]+2*StepSizeMin*Point;
         SminMin0=Close[shift]-2*StepSizeMin*Point;
         SmaxMax0=Close[shift]+2*StepSizeMax*Point;
         SminMax0=Close[shift]-2*StepSizeMax*Point;
         SmaxMid0=Close[shift]+2*StepSizeMid*Point;
         SminMid0=Close[shift]-2*StepSizeMid*Point;
         if (Close[shift]>SmaxMin1) TrendMin=1; 
         if (Close[shift]<SminMin1) TrendMin=-1;
         if (Close[shift]>SmaxMax1) TrendMax=1; 
         if (Close[shift]<SminMax1) TrendMax=-1;
         if (Close[shift]>SmaxMid1) TrendMid=1; 
         if (Close[shift]<SminMid1) TrendMid=-1;
      }
      if (TrendMin>0 && SminMin0<SminMin1) SminMin0=SminMin1;
      if (TrendMin<0 && SmaxMin0>SmaxMin1) SmaxMin0=SmaxMin1;
      if (TrendMax>0 && SminMax0<SminMax1) SminMax0=SminMax1;
      if (TrendMax<0 && SmaxMax0>SmaxMax1) SmaxMax0=SmaxMax1;
      if (TrendMid>0 && SminMid0<SminMid1) SminMid0=SminMid1;
      if (TrendMid<0 && SmaxMid0>SmaxMid1) SmaxMid0=SmaxMid1;
      if (TrendMin>0) linemin=SminMin0+StepSizeMin*Point;
      if (TrendMin<0) linemin=SmaxMin0-StepSizeMin*Point;
      if (TrendMax>0) linemax=SminMax0+StepSizeMax*Point;
      if (TrendMax<0) linemax=SmaxMax0-StepSizeMax*Point;
      if (TrendMid>0) linemid=SminMid0+StepSizeMid*Point;
      if (TrendMid<0) linemid=SmaxMid0-StepSizeMid*Point;
      bsmin=linemax-StepSizeMax*Point;
      bsmax=linemax+StepSizeMax*Point;
      theDelta = bsmax-bsmin;
      if (theDelta!=0) {
         Stoch1=NormalizeDouble((linemin-bsmin)/theDelta,6);
         Stoch2=NormalizeDouble((linemid-bsmin)/theDelta,6);
      }
      prev_y=Stoch1-Stoch2;
      if (prev_y<0) {
         BufferUp[shift]=0;
         BufferDn[shift]=prev_y;
      }
      else if (prev_y>0) {
         BufferUp[shift]=prev_y;
         BufferDn[shift]=0;
      }
      SminMin1=SminMin0;
      SmaxMin1=SmaxMin0;
      SminMax1=SminMax0;
      SmaxMax1=SmaxMax0;
      SminMid1=SminMid0;
      SmaxMid1=SmaxMid0;
   }
}