//+------------------------------------------------------------------+
//|                                                  ZigZagAlarm.mq4 |
//|                                                      John Taylor |
//|                          http://www.linkedin.com/in/johntaylorhk |
//+------------------------------------------------------------------+
#property copyright "John Taylor"
#property link      "http://www.linkedin.com/in/johntaylorhk"
#property indicator_chart_window

extern string E_SoundFile = "sonar.wav";

int init() {
   return(0);
}

int deinit() {
   return(0);
}

int start() {
   AlarmZigZagChange();
   return(0);
}

void AlarmZigZagChange() {
   static double prevZZ =0;
   double newZZ=0;
   
   if(IsTesting())return;//iCustom is CPU intensive
   
   for(int i=0;i<100;i++) {
      newZZ=iCustom(NULL,0,"ZigZag",0,i);
      if(newZZ!=0) break;
   }
   
   if (newZZ>0) {
      if(newZZ!=prevZZ) {
         PlaySound(E_SoundFile);
      }
   }
   prevZZ=newZZ;
}