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

#property indicator_chart_window
#property indicator_buffers 4
#property indicator_color1 Yellow
#property indicator_color2 Teal
#property indicator_color3 Teal
#property indicator_color4 White

//---- input parameters
extern int  StepSize   = 6000;      
extern int  Advance    = 0;       

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

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
  int init()  {

  string short_name;
//---- indicator line
   IndicatorBuffers(4);
   IndicatorDigits(2);//Digits    
   
   SetIndexStyle(0,DRAW_LINE,0,2);
   SetIndexStyle(1,DRAW_NONE,2,1);
   SetIndexStyle(2,DRAW_NONE,2,1);
   SetIndexStyle(3,DRAW_NONE);
   
   SetIndexBuffer(0,Line1Buffer);
   SetIndexBuffer(1,Smax);
   SetIndexBuffer(2,Smin);
   SetIndexBuffer(3,Trend);
   
   SetIndexShift(0,Advance);
   SetIndexShift(1,0);
   SetIndexShift(2,0);
   SetIndexShift(3,0);
   
//---- name for DataWindow and indicator subwindow label
   short_name="Step ("+StepSize/10+")";
   IndicatorShortName(short_name);
   SetIndexLabel(0,"StepMa");
   SetIndexLabel(1,"Smax");
   SetIndexLabel(2,"Smin");
   SetIndexLabel(3,"Trend");
//----
   SetIndexDrawBegin(0,0);
   SetIndexDrawBegin(1,0);
   SetIndexDrawBegin(2,0);
   SetIndexDrawBegin(3,0);
//----
   return(0);
   }
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit() {
//---- 
   
//----
   return(0);
  }     
//+------------------------------------------------------------------+
//| StepCalc Function                                                         |
//+------------------------------------------------------------------+
int start() {

     int i;
     int counted_bars=IndicatorCounted();
  //---- check for possible errors
     if(counted_bars<0) return(-1);
  //---- the last counted bar will be recounted
     if(counted_bars>0) counted_bars--;
     int limit=Bars-counted_bars;
  //---- main loop
         for( i=limit; i>=0; i-- ) {	

	        Smax[i]=Low [i]+2.0*StepSize*Point;
	        Smin[i]=High[i]-2.0*StepSize*Point;

	        Trend[i]=Trend[i+1];   

	        if (Low [i]<Smin[i+1]) Trend[i]=-1;  
	        if (High[i]>Smax[i+1]) Trend[i]=1;   
	 
	        if(Trend[i]<0)  {
	           if(Smax[i]>Smax[i+1])      Smax[i]=Smax[i+1];
       	    
       	          Line1Buffer[i] = Smax[i] - StepSize*Point; 
	                }

	        if(Trend[i]>0) {
	           if(Smin[i]<Smin[i+1])      Smin[i]=Smin[i+1];
   	       
   	             Line1Buffer[i] = Smin[i] + StepSize*Point; 
   	             } 
	  

      }
	return(0);	
   }

//---------------------------FIM DO START---------------------