How to best check performance of EA or Indicator?

 

Hi,

how would you recommend to test an expert advisor? Either bought or self-written indicator.

I think in such as

SL=100, TP=100, maybe Trail=? -> so Trade Win Rate should result greater than 50% and give profit (excluded spread, slip, commission).

I use often M5, sometimes M1, seldom M15, but so long I hadn't found a good test setup.

I have written an indicator with win rate 96% when using SL=0, draw down 22% from 2019 till now. So it's very, maybe too risky. Is such setup worth it?

Many thanks

Al