//+------------------------------------------------------------------+
//|                                                    StepMA_v2.mq4 |
//|                           Copyright © 2005, TrendLaboratory Ltd. |
//|                                       E-mail: igorad2004@list.ru |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, TrendLaboratory Ltd."
#property link      "E-mail: igorad2004@list.ru"

#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 Yellow
#property indicator_color2 DeepSkyBlue
#property indicator_color3 Tomato
//---- input parameters
extern int PeriodWATR=10;
extern double Kwatr=1.0000;
extern int AdvanceMin=0;
extern int AdvanceMax=0;
extern int AdvanceMid=0;
extern int HighLow=0;
//---- indicator buffers
double LineMinBuffer[];
double LineMaxBuffer[];
double LineMidBuffer[];
//+------------------------------------------------------------------+
//| 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);
   SetIndexStyle(2,DRAW_LINE,STYLE_SOLID,1);
   SetIndexShift(0,AdvanceMin);
   SetIndexShift(1,AdvanceMax);
   SetIndexShift(2,AdvanceMid);
   SetIndexBuffer(0,LineMinBuffer);
   SetIndexBuffer(1,LineMaxBuffer);
   SetIndexBuffer(2,LineMidBuffer);
   IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS));
//---- name for DataWindow and indicator subwindow label
   short_name="StepMA 3D("+PeriodWATR+")";
   IndicatorShortName(short_name);
   SetIndexLabel(0,"StepMA min");
   SetIndexLabel(1,"StepMA max");
   SetIndexLabel(2,"StepMA mid");
//----
   SetIndexDrawBegin(0,PeriodWATR);
   SetIndexDrawBegin(1,PeriodWATR);
   SetIndexDrawBegin(2,PeriodWATR);
//----
   return(0);
  }

//+------------------------------------------------------------------+
//| StepMA_3D_v1                                                         |
//+------------------------------------------------------------------+
int 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;
   
   	
   for(shift=Bars-1;shift>=0;shift--)
   {	
	SumRange=0;
	for (i=PeriodWATR-1;i>=0;i--)
	    { 
       dK = 1.0+1.0*(PeriodWATR-i)/PeriodWATR;
       SumRange+= dK*MathAbs(High[i+shift]-Low[i+shift]);
       //Print(" dK= ",dK);
       }
	WATR0 = SumRange/PeriodWATR;
	
	WATRmax=MathMax(WATR0,WATRmax);
	if (shift==Bars-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);
	
	Comment(" StepSize_min = ", StepSizeMin,"\n",
	        " StepSize_mid = ", StepSizeMid,"\n",
	        " StepSize_max = ", StepSizeMax);
	
	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) LineMinBuffer[shift]=SminMin0+StepSizeMin*Point;
	  if (TrendMin<0) LineMinBuffer[shift]=SmaxMin0-StepSizeMin*Point;
	  
	  if (TrendMax>0) LineMaxBuffer[shift]=SminMax0+StepSizeMax*Point;
	  if (TrendMax<0) LineMaxBuffer[shift]=SmaxMax0-StepSizeMax*Point;
	  
	  if (TrendMid>0) LineMidBuffer[shift]=SminMid0+StepSizeMid*Point;
	  if (TrendMid<0) LineMidBuffer[shift]=SmaxMid0-StepSizeMid*Point;
	  
	  SminMin1=SminMin0;
	  SmaxMin1=SmaxMin0;
	  
	  SminMax1=SminMax0;
	  SmaxMax1=SmaxMax0;
	  
	  SminMid1=SminMid0;
	  SmaxMid1=SmaxMid0;
	 }
	return(0);	
 }