Spend some time on Stock Rover | Investing and FINVIZ.com - Stock Screener. You'll learn a tremendous amount in a short time. Stock Rover's screener is one of the best and it's currently free. There's a video of it here:
Some people really like Finviz too, although I'm not wild about it...
You can use Stock Rover | Investing for fundamentals as well as technicals. RSI is one of the 300 or so metrics they support. It's free and beat the paid screeners.