That's a good idea, but I have 2 problems with that:

1) I want to be conscious and watching the movements happen when I buy my coins. I don't like buying on the way down, I want to buy as close to the bottom as possible. I feel I have a better chance of doing that if I am creating the orders at the time of the movement.

2) I use coinbase, and am too lazy to send a bunch of info to set up an account with stamp