In theory, this shouldn't be able to predict future financial information or stock prices, because the stock prices should already reflect any information that

In theory, this shouldn't be able to predict future financial information or stock prices, because the stock prices should already reflect any information that would be used in the prediction model (efficient market hypothesis). Of course, that's just a theory. Thousands of traders think they can beat the market with tools, models, and prediction engines of their own (though few actually do) So, in the end, this site may attract that type of crowd, people who think they are gleaning information to help them "win" - in actuality, I'd be skeptical about its ability to do that though.