Price Alert for Nifty and Sensex?

Does any one know a website that would send us an alert when Nifty or Sensex reaches a price target?

Ex: I would like to receive an alert if the Nifty is above a value or below a value. I live in US.

Thanks for your help !!

PS: Just registered and this is my first post.

finance.yahoo.com

Nasdaq and Sensex Live on Google gtalk. Add [email protected] OR [email protected] to your Google gtalk. It will send you alert when your price threshold will cross.