VKW Bands

//+------------------------------------------------------------------+
//| VKW Bands.mq4.mq4
//| Rosh
//| http://www.investo.ru/forum/viewtopic.php?p=188196&sid=3564b6effe75d85c5526211453ddb860#188196
//+------------------------------------------------------------------+
#property copyright "Rosh"
#property link      "http://www.investo.ru/forum/viewtopic.php?p=188196&sid=3564b6effe75d85c5526211453ddb860#188196"

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Blue
#property indicator_color2 Blue
//---- input parameters
extern int       RangePeriod=10;
extern int       SmoothPeriod=100;
extern int       SmoothMode=MODE_SMA;
//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
double ExtMapBuffer4[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   IndicatorBuffers(4);
   SetIndexStyle(0,DRAW_LINE);
   SetIndexBuffer(0,ExtMapBuffer1);
   SetIndexDrawBegin(0,SmoothPeriod);
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(1,ExtMapBuffer2);
   SetIndexDrawBegin(1,SmoothPeriod);
   SetIndexBuffer(2,ExtMapBuffer3);
   SetIndexBuffer(3,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;
   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--)
      {
      ExtMapBuffer3[cnt]=High[Highest(NULL,0,MODE_HIGH,RangePeriod,cnt)];
      ExtMapBuffer4[cnt]=Low[Lowest(NULL,0,MODE_LOW,RangePeriod,cnt)];
      }   
   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);
  }
//+------------------------------------------------------------------+