I found Indigo to be a 'typical' black box - great backtest, lousy in anything other than a bull market. The developer started (with others) a so-called hedge fund 18 months ago to trade 'the very latest parameters', with a conservative annual target of +50%. The last I heard, which was about two months ago, they were still in negative territory. If the developer can't make money, what chance does anyone else have !? However, I met the developer a couple of years back & he told me they were turning over (= selling software) "more than Omega", ie. that's where they make a lot of money.
The moral of this story, which I think I am finally beginning to 'get', is that the only real success comes from learning to trade directly oneself.