the three-settings check, but both knobs move at once?

read that sensitivity study in the strategy library last night, the one where the same entry gets posted at tight / middle / loose and you compare trade counts before results. Honestly it's the most useful thing I've read here in a while because it's basically free — I already have the entry, I just run it three times. But something bugs me and I want to know if I'm being pedantic. In the three versions BOTH the angle threshold and the strength threshold move together. So if the loose one behaves weird, I don't know which knob did it. Isn't that two experiments smushed into one? My instinct is to hold strength fixed and only slide the angle, then do the reverse. That's six runs instead of three but it feels like it actually tells you something. Other thing: I trade perps, not stocks. Their whole "trade count first" rule scares me a bit on crypto because the loose version will fire constantly and I'm paying fees and funding on every one of those. So a smooth curve on paper could still be a smooth curve of me bleeding out. Do I judge the pattern before costs and then apply costs after, or do I bake costs in from the start and accept the loose one is going to look worse for reasons that have nothing to do with whether the idea is real? Also the bit about "only the tight version works = small sample" — how few trades is too few before I stop pretending it means anything? They don't really say and I have a bad habit of falling in love with an entry that fired a handful of times and printed.