//+------------------------------------------------------------------+
//|                                                    VKW Bands.mq4 |
//|                      Copyright © 2008, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.net |
//+------------------------------------------------------------------+

#property copyright "Alksnis Gatis"
#property link      "2xpoint@gmail.com"
//----
#property indicator_separate_window
#property indicator_buffers 3
#property indicator_color1 Blue
#property indicator_color2 Red
#property indicator_color3 White
#property  indicator_width2  2
//---- input parameters 
extern int       RangePeriod=25;
extern int       SmoothPeriod=3;
extern int       SmoothMode=MODE_SMA;
extern int       Per=5;
//---- buffers 
double ExtMapBuffer0[];
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
double ExtMapBuffer4[];
//double ExtMapBuffer5[]; 
//+------------------------------------------------------------------+ 
//| Custom indicator initialization function                         | 
//+------------------------------------------------------------------+ 
int init()
  {
//---- indicators 
   IndicatorBuffers(5);
   SetIndexStyle(0,DRAW_LINE);
   SetIndexBuffer(0,ExtMapBuffer1);
   SetIndexDrawBegin(0,SmoothPeriod);
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(1,ExtMapBuffer2);
   SetIndexDrawBegin(1,SmoothPeriod);
   SetIndexBuffer(2,ExtMapBuffer0);
   SetIndexBuffer(3,ExtMapBuffer3);
   SetIndexBuffer(4,ExtMapBuffer4);
//---- 
   return(0);
  }
//+------------------------------------------------------------------+ 
//| Custom indicator deinitialization function                       | 
//+------------------------------------------------------------------+ 
int deinit()
  {
//---- 
//---- 
   return(0);
  }
//+------------------------------------------------------------------+ 
//| Custom indicator iteration function                              | 
//+------------------------------------------------------------------+ 
int start()
  {
   int    counted_bars=IndicatorCounted();
//---- 
   int limit,limit1,cnt,n_max,n_min;
   if (counted_bars==0)
     {
      limit=Bars-RangePeriod;
      limit1=limit-SmoothPeriod;
     }
   if (counted_bars>0)
     {
      limit=Bars-counted_bars;
      limit1=limit;
     }
   limit--;
   limit1--;
   for(cnt=limit; cnt>=0;cnt--)
     {
      ExtMapBuffer0[cnt]=iCustom(NULL,0,"METRO",1,cnt);
     }
   for(cnt=limit; cnt>=0;cnt--)
     {
      n_max=ArrayMaximum(ExtMapBuffer0,RangePeriod,cnt);
      n_min=ArrayMinimum(ExtMapBuffer0,RangePeriod,cnt);
      ExtMapBuffer3[cnt]=ExtMapBuffer0[n_max];
      ExtMapBuffer4[cnt]=ExtMapBuffer0[n_min];
     }
   for(cnt=limit1; cnt>=0;cnt--)
     {
      ExtMapBuffer1[cnt]=iMAOnArray(ExtMapBuffer3,0,SmoothPeriod,0,SmoothMode,cnt);
      ExtMapBuffer2[cnt]=iMAOnArray(ExtMapBuffer4,0,SmoothPeriod,0,SmoothMode,cnt);
     }
//---- 
   return(0);
  }
//+------------------------------------------------------------------+