I'm not saying RSI should make money. Aafwintb asked a question about the 'robustness' of systems and, as an example, said should he use an RSI of 6 with x statistics or an RSI of 12 with y statistics. My comment was that choosing between 6 or 12 is not the most important thing. When looking for a 'robust' system you need to ensure that a wide range of input values are profitable i.e. 1-30 not just 6 and 12. In that way as the market changes in the future you are still likely to make money. You can replace RSI with anything.