I bought Omnitrader 2002 and tried to use it with the signals generated but it didn't teach me how to trade. Those signals can change in the middle of a trade when you backtest. I have studied Tom O'Briens "Timing the Trade" using ABC's and fibonacci confluence and it works for me. Along with listening to Tim Ord and Tom O'brien on their internet radio they have given me insight into a world that Omnitrader will not. Omnitrader may give you prospects to look for in the market but I would try to trade by price and volume and obvious chart patterns.
http://www.tfnn.com is the source for Timing the Trade