//+------------------------------------------------------------------+
//|                                                 HighLowBands.mq4 |
//|                                      Copyright © 2006, Maji, Tim |
//|                                                                  |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, Maji, Tim "
#property link      "None"

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Lime
#property indicator_color2 Red
//---- indicator parameters
extern int LookBackPeriod=3;

//---- buffers
double UBBuffer[];
double LBBuffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   IndicatorBuffers(2);
   SetIndexStyle(0,DRAW_LINE);
   SetIndexBuffer(0,UBBuffer);
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(1,LBBuffer);

//----
   //SetIndexDrawBegin(0,0);
   //SetIndexDrawBegin(1,0);
//----
   return(0);
  }

int start()
  {
//----
   int counted_bars=IndicatorCounted();
   int i;
   bool long=false;

   if(Bars<=LookBackPeriod) return(0);
//---- initial zero
   if(counted_bars<1)
      for(i=1;i<=LookBackPeriod;i++)
        {
         UBBuffer[Bars-i]=EMPTY_VALUE;
         LBBuffer[Bars-i]=EMPTY_VALUE;
        }
//----
   int limit=Bars-counted_bars;
   if(counted_bars>0) limit++;
//----
   i=Bars-LookBackPeriod+1;
   if(counted_bars>LookBackPeriod-1) i=Bars-counted_bars-1;
   while(i>=0)
     {
      UBBuffer[i]=High[Highest(NULL,0,MODE_HIGH,LookBackPeriod,i)];
      LBBuffer[i]=Low[Lowest(NULL,0,MODE_LOW,LookBackPeriod,i)];      
      i--;
     }
//----
   return(0);
  }
//+------------------------------------------------------------------+