DynamicRS_3CLines

//+------------------------------------------------------------------+
//|                                            DynamicRS_3CLines.mq4 |
//|                                 Copyright © 2007, Nick A. Zhilin |
//|                                                  rebus58@mail.ru |
//+------------------------------------------------------------------+

#property copyright "Copyright © 2007, Nick A. Zhilin"
#property link      "rebus58@mail.ru"

#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 Yellow
#property indicator_color2 Aqua
#property indicator_color3 Red

//---- buffers
double ExtMapBuffer1[];
double TopLine[];
double BottomnLine[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
   IndicatorShortName("DynamicRS_3CLines");
//---- indicators
   SetIndexStyle(0,DRAW_LINE,STYLE_SOLID,2);
   SetIndexBuffer(0,ExtMapBuffer1);
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(1,TopLine);
   SetIndexStyle(2,DRAW_LINE);
   SetIndexBuffer(2,BottomnLine);

//----
   return(0);
  }
//+------------------------------------------------------------------+
//| DynamicRS                                                        |
//+------------------------------------------------------------------+
int start()
  {
   int i,counted_bars=IndicatorCounted();

//----
   i=Bars-counted_bars-1;
   while(i>=0)
     {
      if(High[i]<High[i+1] && High[i]<ExtMapBuffer1[i+1])   
         {
          ExtMapBuffer1[i]=High[i];
          BottomnLine[i]=High[i];
          TopLine[i]=TopLine[i+1];
         }          
      else if(Low[i]>Low[i+1] && Low[i]>ExtMapBuffer1[i+1])
         {
          ExtMapBuffer1[i]=Low[i];
          TopLine[i]=Low[i];
          BottomnLine[i]=BottomnLine[i+1];
         }
      else
         {
          ExtMapBuffer1[i]=ExtMapBuffer1[i+1];
          if(ExtMapBuffer1[i+1]==TopLine[i+1]) 
             {
              TopLine[i]=ExtMapBuffer1[i+1];
              BottomnLine[i]=BottomnLine[i+1];
             }
          else if(ExtMapBuffer1[i+1]==BottomnLine[i+1]) 
             {
              BottomnLine[i]=ExtMapBuffer1[i+1];
              TopLine[i]=TopLine[i+1];
             }
         }         
      i--;
     }


//----
   return(0);
  }
//+------------------------------------------------------------------+