Quote Sentinel is a web based stock monitoring application that watches your stocks and notifies you whenever your stocks trade to critical prices. You can select which stocks you want to monitor and define the critical price change for each stock. Once your stock hits that self-defined high or low you will automatically receive an alert so that you can take action immediately no matter where you are! For example, let’s say you’re interested in buying AAPL (Apple) stock it if it ever goes back down to $200. Set an alert in your profile and you’ll be sent an instant alert when it reaches that low so you can be one of the first to take action!