//+------------------------------------------------------------------+
//|                                                   PriceAlert.mq4 |
//|                              Copyright © 2009, www.earnforex.com |
//|           Issues sound alerts when price reaches certain levels. |
//+------------------------------------------------------------------+
#property copyright "EarnForex.com"
#property link      "http://www.earnforex.com"

#property indicator_chart_window

extern double SoundWhenPriceGoesAbove = 0;
extern double SoundWhenPriceGoesBelow = 0;
extern double SoundWhenPriceIsExactly = 0;

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init() 
{
   if (SoundWhenPriceIsExactly > 0)
   {
      ObjectCreate("SoundWhenPriceIsExactly", OBJ_HLINE, 0, Time[0], SoundWhenPriceIsExactly);
      ObjectSet("SoundWhenPriceIsExactly", OBJPROP_STYLE, STYLE_SOLID);
      ObjectSet("SoundWhenPriceIsExactly", OBJPROP_COLOR, Yellow);
      ObjectSet("SoundWhenPriceIsExactly", OBJPROP_WIDTH, 1);
   }
   if (SoundWhenPriceGoesAbove > 0)
   {
      ObjectCreate("SoundWhenPriceGoesAbove", OBJ_HLINE, 0, Time[0], SoundWhenPriceGoesAbove);
      ObjectSet("SoundWhenPriceGoesAbove", OBJPROP_STYLE, STYLE_SOLID);
      ObjectSet("SoundWhenPriceGoesAbove", OBJPROP_COLOR, Green);
      ObjectSet("SoundWhenPriceGoesAbove", OBJPROP_WIDTH, 1);
   }
   if (SoundWhenPriceGoesBelow > 0)
   {
      ObjectCreate("SoundWhenPriceGoesBelow", OBJ_HLINE, 0, Time[0], SoundWhenPriceGoesBelow);
      ObjectSet("SoundWhenPriceGoesBelow", OBJPROP_STYLE, STYLE_SOLID);
      ObjectSet("SoundWhenPriceGoesBelow", OBJPROP_COLOR, Red);
      ObjectSet("SoundWhenPriceGoesBelow", OBJPROP_WIDTH, 1);
   }
   return(0);
}

//+------------------------------------------------------------------+
//| Custor indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
{
   ObjectDelete("SoundWhenPriceIsExactly");
   ObjectDelete("SoundWhenPriceGoesAbove");
   ObjectDelete("SoundWhenPriceGoesBelow");
   return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
{
   if ((Ask > SoundWhenPriceGoesAbove) && (SoundWhenPriceGoesAbove > 0))
   {
      Alert("Price above the alert level.");
      PlaySound("alert.wav");
      ObjectDelete("SoundWhenPriceGoesAbove");
      SoundWhenPriceGoesAbove = 0;
   }
   if ((Bid < SoundWhenPriceGoesBelow) && (SoundWhenPriceGoesBelow > 0))
   {
      Alert("Price below the alert level.");
      PlaySound("alert.wav");
      ObjectDelete("SoundWhenPriceGoesBelow");
      SoundWhenPriceGoesBelow = 0;
   }
   if ((Bid == SoundWhenPriceIsExactly) || (Ask == SoundWhenPriceIsExactly))
   {
      Alert("Price is exactly at the alert level.");
      PlaySound("alert.wav");
      ObjectDelete("SoundWhenPriceIsExactly");
      SoundWhenPriceIsExactly = 0;
   }
   return(0);
}
//+------------------------------------------------------------------+