BigBarSound

//+------------------------------------------------------------------+
//|                                                  BigBarSound.mq4 |
//|                                               Alexey Volchanskiy |
//|                                         http://www.robo-forex.ru |
//+------------------------------------------------------------------+
#property copyright "Alexey Volchanskiy"
#property link      "http://www.robo-forex.ru"
#property version   "1.00"
#property strict
#property description "EA plays WavFile when bar size is lager of BarPoint value"


enum StartPoint {OpenClose,HighLow};

input int           BarPoint    = 200;
input StartPoint    SP          = HighLow;
input string        WavFile     = "alert.wav";

//+------------------------------------------------------------------+
//| Detects begin of new bar                                         |
//+------------------------------------------------------------------+
bool NewBar()
  {
   static datetime lastbar=0;
   datetime curbar=iTime(NULL,0,0);
   if(lastbar!=curbar)
     {
      lastbar=curbar;
      return (true);
     }
   return(false);
  }

void OnTick()
  {
   RefreshRates();
   double diff=0;
   static bool trigger=true; // for one-shot play sound in bar duration
   if(NewBar())
      trigger=true;

   if(SP==OpenClose)
      diff=MathAbs(Ask-iOpen(NULL,0,0));
   else
      diff=MathAbs(iHigh(NULL,0,0)-iLow(NULL,0,0));
   if(trigger && diff>=BarPoint*Point())
     {
      PlaySound(WavFile);
      trigger=false;
     }
  }

int OnInit()
  {
   return(INIT_SUCCEEDED);
  }

void OnDeinit(const int reason)
  {
  }