Oh ok. I misunderstood. Thought you said you were giving an example parameter that sounded like non-sense to me. Sorry about that.
Anyways, yes, I think the vast majority of ‘good’ trends found….even those found by the best of the best of whatever….will regress away from their great records. The roi generally goes down namely if not a complete reversal.
The idea of what SPECIFICALLY makes any gambling system merely viable is an art.