The site has been a relatively new addition to a program I've worked on for years. I feel it is finally polished enough and has enough data to promote with others.
The real engine behind the website runs nightly and uses data mining techniques to build a model to predict results. The training data is all set for a percentage change on the stock price a 120 days away. This is long enough that financials and market influences should dominate the price as a whole (especially considering 1 quarter of earnings has yet to come in, in that time span).
The UI while comparatively simple still requires enough data, help and easy to read charts to be accessible to at least the statistically minded investment audience. I believe it has reached that point.