You can use the RSI, buying on crossing 30 and selling on crossing back down over 70,theres a bit more to it than this, but im keeping it simple.
I mainly look for a divergence for reversals using RSI or MOMENTUM.
I go to investtech.com sometime's it does seem a very good site.I believe that a company called insight-support are making up a similar program,might be worth taking a look.
Good luck trading