#property copyright "me"
#property link      "http://www.mql5.com"
#property version   "1.00"
#property strict
#property indicator_chart_window

extern int Bollinger_Open = 5;

// Declaring arrays (for indicator buffers)
double Array_uBB[], Array_lBB[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   SetIndexBuffer(0,Array_uBB);
   SetIndexStyle (0,DRAW_ARROW,STYLE_SOLID,1,Blue);     
   SetIndexArrow(0,225);
   SetIndexBuffer(1,Array_lBB);
   SetIndexStyle (1,DRAW_ARROW,STYLE_SOLID,1,Blue);    
   SetIndexArrow(1,226);
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
//---
   int limit;
   int counted_bars = IndicatorCounted(); 
   if(counted_bars<0) return(-1);
   if(counted_bars>0) return(-1);  
   if(counted_bars<1) counted_bars=1;
   limit = Bars-counted_bars;
   Comment("rec. Amount of Candles: ",Bars," counted Bars: ",counted_bars," Limit: ",limit);
   
   for(int i=0;i<limit;i++)
   {
    double uBB_0 = iBands(NULL,0,20,2,0,PRICE_CLOSE,MODE_UPPER,i);   //upper band of the recent candle
    double uBB_1 = iBands(NULL,0,20,2,0,PRICE_CLOSE,MODE_UPPER,i+1); //upper band of the previous candle
    double lBB_0 = iBands(NULL,0,20,2,0,PRICE_CLOSE,MODE_LOWER,i);   //lower band of the recent candle
    double lBB_1 = iBands(NULL,0,20,2,0,PRICE_CLOSE,MODE_LOWER,i+1); //lower band of the previous candle
    
    if((uBB_0-uBB_1)*10000>Bollinger_Open && (lBB_1-lBB_0)*10000>Bollinger_Open)
    {
     Array_uBB[i] = uBB_0;
     Array_lBB[i] = lBB_0;
     }
    }

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