Un Dn Bar

//+------------------------------------------------------------------+
//|                                               Up Down Bar.mq4 |
//|                         Copyright © 2008, TradeForexFx |
//|                                 |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2008, TradeForexFx"
#property link      "http://"

//#property indicator_separate_window

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Blue
#property indicator_color2 Red

//---- input parameters
extern int       Percent = 33;

//---- buffers
double up[];
double dn[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
{
//---- indicators
   SetIndexStyle(0, DRAW_ARROW, EMPTY);
   SetIndexBuffer(0, up);
   SetIndexArrow(0, 233);

   SetIndexStyle(1, DRAW_ARROW, EMPTY);
   SetIndexBuffer(1, dn);
   SetIndexArrow(1, 234);
   

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

//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
{
//----
   
//----
   return(0);
}

//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
//int start()
//{
 //  int    counted_bars = IndicatorCounted();
 //  double spread;
 //  double band;
 //  int limit = Bars - counted_bars;
 //  if(counted_bars == 0)
 //  {
 //     limit = Bars - 1;
 //  }
     
   
 int start() {

   int limit, i, counter;
   int counted_bars=IndicatorCounted();
   double spread;
   double band;
   double Range, AvgRange;
 
   
//---- check for possible errors
   if(counted_bars<0) return(-1);
//---- last counted bar will be recounted
   if(counted_bars>0) counted_bars--;

   limit=Bars-counted_bars;
   
   
//----
//   for(int i = 0; i < limit; i++)
//   {
   
     for(i = 0; i <= limit; i++) {
   
      counter=i;
      Range=0;
      AvgRange=0;
      for (counter=i ;counter<=i+9;counter++)
      {
         AvgRange=AvgRange+MathAbs(High[counter]-Low[counter]);
      }
      Range=AvgRange/10;  
    
   
   
   
   
   
   
      spread = High[i] - Low[i];
      band = spread * Percent * 0.01;
      
      up[i] = 0;
      dn[i] = 0;
      
      if(Open[i] < Low[i] + band && Close[i] > High[i] - band)
      {
      //   dn[i] = Low[i];
         up[i] = Low[i] - Range*0.5;
      }
      else if(Close[i] < Low[i] + band && Open[i] > High[i] - band)
      {
    //     up[i] = Low[i];
         dn[i] = High[i] + Range*0.5;
      }
   }
//----
   return(0);
}
//+------------------------------------------------------------------+