Well I decided to try it and now I will have to see if the money back guarentee is as good as they say 🙁
I can't find any use for it as the predictions seem to be scattered fairly randomly on the data I have tested it with. If you look at their sample page, it predicts Microsoft to close at 49.54 on 11-Jun-02. The actual close was 52.57. Not only are the close predictions a long way out, they don't seem to offer any help when deciding if the stock or index is going to close up or down the next day. Perhaps with changing all the settings and using different amounts of data I could get better results but I don't think it is worth the effort.
Hope this saves someone parting with their hard earned.