//+------------------------------------------------------------------+
//|                                                      HighLow.mq4 |
//|                                              Copyright 2015, AM2 |
//|                                      http://www.forexsystems.biz |
//+------------------------------------------------------------------+
#property copyright "Copyright 2015, AM2"
#property link      "http://www.forexsystems.biz"
#property version   "1.00"
#property strict
#property indicator_chart_window

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

input int BarsCount=100;
//--- buffers
double UpBuf[];
double DnBuf[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
   IndicatorBuffers(2);
   SetIndexBuffer(0,UpBuf);
   SetIndexBuffer(1,DnBuf);

//--- indicator line
   SetIndexStyle(0,DRAW_ARROW,STYLE_SOLID,1);
   SetIndexArrow(0,108);
   SetIndexStyle(1,DRAW_ARROW,STYLE_SOLID,1);
   SetIndexArrow(1,108);

   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
   for(int i=0; i<BarsCount; i++)
     {
      if(High[i+2]>High[i+1] && High[i]>High[i+1])
        {
         UpBuf[i]=Low[i];
        }

      if(Low[i+2]<Low[i+1] && Low[i]<Low[i+1])
        {
         DnBuf[i]=High[i];
        }
     }
   return(rates_total);
  }
//+------------------------------------------------------------------+