I have been following the trend signals posted by this site, and they seem to work quite nicely. It is not the holly grail by any means but it works!
So basically you get their trend signals(for free, as far as I've seen), use some free-for-all stock-screeners and you got yourself a nice trading system.

One of the most common questions the struggling trader has is “where am I going wrong?”. There can often appear to be such a mind boggling array of variables in trading, that it seems impossible to unravel the primary issues.

When you strip away your emotions on the subject and look at your situation with cold hard analysis, there are really only two main variables:

Story about a stock trading system that says it can beat the market daily. System is free and sends out signals in real time to users on about 140 stocks.