i want to know how well the classic quantitative investing method work ,such as wavelet analasis, neural network, random process and so on. Do they can give investors important information? If it is, the different persons analyze the same charting by the same analysis tool, such as wavelet analysis, and then they get the almost same result. after that they will all earn much from market? I mean these methods refer to many complated math formula and i doubt their effects, but i don;t use them until now, so now i want to get some advice about them from some quants who use them and know them well. In addition, I want to some other websites for quants, focusing on quantitative investing field. Could you show some related websites? Thank you very much