I suspect Popov has better things to do than play referee...

The MINIMUM value you set in the Acceptance Criteria is not computed -- you enter it, right?

The filter you mention is used to filter (i.e. sort) strategies in a Collection based on their statistics -- those statistics were computed by the back testing engine, right?

It's been awhile since I've had statistics, but there is a rule about how many significant digits are valid. I mean, why just use 2? Why not 5 or 17? The number of significant digits implies accuracy. For example, if you Google the time to drive from LA to NY it says 41 hours. It doesn't say 41.372891 hours. That's because if you were to make the drive 100 times it wouldn't come out 41.372891 hours each time, which is why the value is rounded to the nearest hour. The number of significant digits that are statistically valid is related to how reproducible a measurement is.

When it comes to Sharpe ratio we all know very small changes in the data horizon can effect significant changes in the ratio -- hence, to think that using a MINIMUM of 0.18 versus 0.14 in the Acceptance Criteria will result in significantly better strategies is misleading. It's just not that accurate, especially when you take into account how optimization works. A difference of 0.5 to 0.2 -- sure, but not 4 one-hundredths. I'm not making this up -- it's basic statistics.

If you don't believe me -- check out the Monte Carlo feature. Do you see how minor perturbations can effect large changes in the equity curve? The statistics of those equity curves can be quite different and their Sharpe ratios for sure differ by more than 4 one-hundredths.

Perhaps you misunderstand the purpose of Acceptance Criteria versus filtering -- or perhaps I do, I don't know. Acceptance Criteria are used to determine which strategies make it into the collection in the first place. Filtering is used to sort strategies that are members of the Collection (i.e. have already passed all Acceptance Criteria) and for whom their back testing statistics have been computed. Acceptance Criteria and collection filtering are two different concepts.