Yes, I made 40% ROI in 2 months using the Coinbase API (buy when threshold met or price < x, sell when threshold met or price > y).
Just add in some kind of intervention system is the sell/buy is high because the volatile nature of the currencies can see major drops/gains which can cause all sorts of bother.
Just add in some kind of intervention system is the sell/buy is high because the volatile nature of the currencies can see major drops/gains which can cause all sorts of bother.