Hello Jacpin,
I succeed to create EAs so far that last for no more than 5 weeks. So I guess this is the thing we need to look for – longer successful performance. This way the longer the EAs last, the less work we will do. At the end of the day, this is why we are at Expert Advisors :) And what do you mean by tighter performance? Why are you looking for SL closer to the TP?