Coca Cola doesn't give it's recipy for free either ... I am using a propietary combo of RSI and slow stoch on an index that's about as far as I am willing to go .... I have no idea if this combo will still work next year. I use a fixed target to get out and also two indicators (one osciclllator and one trendfollowing) whichever comes first. Sometimes I get two signals in one day, sometimes I get none.
But I have diverted my focus to long trading swing/position trading on another index which on average should make me about 14.8% a year return on the monthly chart. Here I am using a trendfollowing indicator. My system is long at this point in time so I need an exitsignal and a new long signal to get me started. This seems to have worked for about 50 years or even 100 years on some indices. SO this system works on all indices but I have one preferred one.
At this moment in time I am focusing on starting a new career. This last solution seems to fit my personality better.
The only thing where I was really sure what's I was doing was in my options semi-market making / vol arbitrage in the DIA. But those days are gone. This was extremely mathematical. I used ideas from that to get my swing/position trading system.