Price Alerts mq4

Price Alert MetaTrader indicator
http://www.earnforex.com/metatrader-indicators/Price-Alert

Trendline Price Alert http://codebase.mql4.com/7648

Or try the snowball anti-grid EA

https://sites.google.com/site/prof7bit/snowball

Desktop Based Forex News Alert

Forex News Alert and it's free
http://fxnewsalert.com