This is a good idea you just have to set it up so you know how many interavals it goes up or down by to notify you, because you dont want like 100 notifications on 1 dollar price differences.

I love this idea too! Another great feature would be, it notifies you when you set dollar amount has achieved your amount

Love this -- potentially add a customizable threshold for movement too, +/- xx % over a week/month maybe?