//+------------------------------------------------------------------+
//|                                                   StepSto_v1.mq4 |
//|                           Copyright © 2005, TrendLaboratory Ltd. |
//|            http://finance.groups.yahoo.com/group/TrendLaboratory |
//|                                       E-mail: igorad2004@list.ru |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, TrendLaboratory Ltd."
#property link      "http://finance.groups.yahoo.com/group/TrendLaboratory"
//----
#property indicator_separate_window
#property indicator_minimum 0
#property indicator_maximum 100
#property indicator_level1 30
#property indicator_level2 70
#property indicator_buffers 2
#property indicator_color1 Red
#property indicator_color2 DeepSkyBlue
//---- input parameters
extern double Kfast=1.0000;
extern double Kslow=1.0000;
//---- indicator buffers
double LineFastBuffer[];
double LineSlowBuffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
  int init()
  {
   string short_name;
//---- indicator line
   SetIndexStyle(0,DRAW_LINE,STYLE_SOLID,1);
   SetIndexStyle(1,DRAW_LINE,STYLE_SOLID,1);
   SetIndexBuffer(0,LineFastBuffer);
   SetIndexBuffer(1,LineSlowBuffer);
   IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS));
//---- name for DataWindow and indicator subwindow label
   short_name="StepSto("+Kfast+","+Kslow+")";
   IndicatorShortName(short_name);
   SetIndexLabel(0,"StepSto Fast");
   SetIndexLabel(1,"StepSto Slow");
//----
   SetIndexDrawBegin(0,10);
   SetIndexDrawBegin(1,10);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| StepSto_v1                                                       |
//+------------------------------------------------------------------+
int start()
  {
   int      shift,TrendMin,TrendMax,TrendMid;
   double   SminMin0,SmaxMin0,SminMin1,SmaxMin1,ATR0,ATRmax,ATRmin;
   double   SminMax0,SmaxMax0,SminMax1,SmaxMax1,SminMid0,SmaxMid0,SminMid1,SmaxMid1;
   double   linemin,linemax,linemid,Sto1,Sto2,bsmin,bsmax;
   double   PeriodATR=10;
   for(shift=Bars-1-PeriodATR;shift>=0;shift--)
     {
      ATR0=iATR(NULL,0,PeriodATR,shift);
      ATRmax=MathMax(ATR0,ATRmax);
      if (shift==Bars-1-PeriodATR) ATRmin=ATR0;
      ATRmin=MathMin(ATR0,ATRmin);
//----
      double StepSizeMin=(Kfast*ATRmin);
      double StepSizeMax=(Kfast*ATRmax);
      double StepSizeMid=(Kfast*0.5*Kslow*(ATRmax+ATRmin));
//----
      SmaxMin0=Close[shift]+2*StepSizeMin;
      SminMin0=Close[shift]-2*StepSizeMin;
      SmaxMax0=Close[shift]+2*StepSizeMax;
      SminMax0=Close[shift]-2*StepSizeMax;
      SmaxMid0=Close[shift]+2*StepSizeMid;
      SminMid0=Close[shift]-2*StepSizeMid;
//----
      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;
      if (TrendMin<0) linemin=SmaxMin0-StepSizeMin;
      if (TrendMax>0) linemax=SminMax0+StepSizeMax;
      if (TrendMax<0) linemax=SmaxMax0-StepSizeMax;
      if (TrendMid>0) linemid=SminMid0+StepSizeMid;
      if (TrendMid<0) linemid=SmaxMid0-StepSizeMid;
//----      
      bsmin=linemax-StepSizeMax;
      bsmax=linemax+StepSizeMax;
      Sto1=(linemin-bsmin)/(bsmax-bsmin);
      Sto2=(linemid-bsmin)/(bsmax-bsmin);
      LineFastBuffer[shift]=Sto1*100;
      LineSlowBuffer[shift]=Sto2*100;
      SminMin1=SminMin0;
      SmaxMin1=SmaxMin0;
      SminMax1=SminMax0;
      SmaxMax1=SmaxMax0;
      SminMid1=SminMid0;
      SmaxMid1=SmaxMid0;
     }
   return(0);
  }
//+------------------------------------------------------------------+