#property copyright "Copyright © 2009, MaGooLaboratory"
#property link      "http://xxx.com.br"

#property indicator_chart_window
#property indicator_buffers 6
#property indicator_color1 Lime
#property indicator_color2 White
#property indicator_color3 White
#property indicator_color4 White
#property indicator_color5 White
#property indicator_color6 White

//---- input parameters
extern int  Z1StepSize   = 900;      
extern int  Z1StepA      = 700;   
extern int  Z1Advance    = 0;       
extern bool Z1HighLow    = true;
extern int  Z1BarsNumber = 0;       

//---- indicator buffers
double Line1Buffer[];
double Line2Buffer[];
double Line3Buffer[];
double Smin[];
double Smax[];
double Trend[];

double Step=0, RevMaxA=0, RevMinA=0;
int limit;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
  int init()  {

  string short_name;
//---- indicator line
   IndicatorBuffers(6);
   IndicatorDigits(2);//Digits    
   
   SetIndexStyle(0,DRAW_LINE,0,2);
   SetIndexStyle(1,DRAW_LINE,0,1);
   SetIndexStyle(2,DRAW_LINE,0,1);
   SetIndexStyle(3,DRAW_NONE,0,1);
   SetIndexStyle(4,DRAW_NONE,0,1);
   SetIndexStyle(6,DRAW_NONE);
   
   SetIndexBuffer(0,Line1Buffer);
   SetIndexBuffer(1,Line2Buffer);
   SetIndexBuffer(2,Line3Buffer);
   SetIndexBuffer(3,Smin);
   SetIndexBuffer(4,Smax);
   SetIndexBuffer(5,Trend);
   
   SetIndexShift(0,Z1Advance);
   SetIndexShift(1,Z1Advance);
   SetIndexShift(2,Z1Advance);
   SetIndexShift(3,0);
   SetIndexShift(4,0);
   SetIndexShift(5,0);
   
//---- name for DataWindow and indicator subwindow label
   short_name="Z1Step( "+Z1StepSize/10+", "+Z1StepA/10+","+Z1Advance+")";
   IndicatorShortName(short_name);
   SetIndexLabel(0,short_name);
   SetIndexLabel(1,"Z1RevMaxA");
   SetIndexLabel(2,"Z1RevMinA");
   SetIndexLabel(3,"Z1Smin");
   SetIndexLabel(4,"Z1Smax");
   SetIndexLabel(5,"Z1Trend");
//----
   SetIndexDrawBegin(0,0);
   SetIndexDrawBegin(1,0);
   SetIndexDrawBegin(2,0);
   SetIndexDrawBegin(3,0);
   SetIndexDrawBegin(4,0);
   SetIndexDrawBegin(5,0);
//----
   return(0);
   }
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit() {
//---- 
   
//----
   return(0);
  }     
//+------------------------------------------------------------------+
//| Step v1.0                                                        |
//+------------------------------------------------------------------+
int start() {

   int shift, counted_bars=IndicatorCounted();
    
   if ( Z1BarsNumber > 0 ) int Nbars=Z1BarsNumber; else Nbars=Bars;
   if ( counted_bars > 0 )  limit=Bars-counted_bars;
   if ( counted_bars < 0 )  return(0);
   if ( counted_bars ==0 )  limit=Nbars-1; 
     
   for(shift=limit;shift>=0;shift--) {	
			
   	Step    = StepCalcZ1  (Z1HighLow, Z1StepSize, shift);
   	RevMaxA = StepCalcZ1  (Z1HighLow, Z1StepSize, shift) + Z1StepA*Point;
   	RevMinA = StepCalcZ1  (Z1HighLow, Z1StepSize, shift) - Z1StepA*Point;
	
   	Line1Buffer[shift] = Step;  
   	Line2Buffer[shift] = RevMaxA;
   	Line3Buffer[shift] = RevMinA;
      }

	return(0);	
   }
//---------------------------FIM DO START---------------------


//---- StepCalculation--------------------------------------------------------------------------------------   
   double StepCalcZ1 (bool HL, double Size, int k) {
   
   int counted_bars=IndicatorCounted();
   double result;
   
   if (HL) {
	  Smax[k]=Low [k]+2.0*Size*Point;
	  Smin[k]=High[k]-2.0*Size*Point;
     } 	
	
	else {
	  Smax[k]=Close[k]+2.0*Size*Point;
	  Smin[k]=Close[k]-2.0*Size*Point;
	  }
	  
	  if (counted_bars==0) {
	  Smax[limit+1]=Smax[limit];
	  Smin[limit+1]=Smin[limit];
	  Trend[limit+1]=0;
	  }
	  
	  Trend[k]=Trend[k+1];   
	  
	  if (High[k]>Smax[k+1]) Trend[k]=1;   
	  if (Low [k]<Smin[k+1]) Trend[k]=-1;  
	 
	  if(Trend[k]>0) {
	  if(Smin[k]<Smin[k+1]) 
	  Smin[k]=Smin[k+1];
	  result=Smin[k]+Size*Point;//=High[k]-Size;
	  } 
	  else  {
	  if(Smax[k]>Smax[k+1]) 
	  Smax[k]=Smax[k+1];
	  result=Smax[k]-Size*Point;//=Low[k]+Size ;
	  }
     //Print (" k=",k," Trend=",Trend[k], " res=",result," Smax=", Smax[k], " Smin=", Smin[k]);
	  
     
     return(result); 
     }