"You will be taken apart by the top players if you signal honestly". Yes, you absolutely will. But if you're wondering "when do you give honest signals", you're at a level where "you will be taken apart by the top players" no matter what you do. You're not good enough to falsecard usefully either - and as David says, partner isn't good enough to see what you're doing and follow along rather than giving the game away (at least that someone isn't being honest). And very very quickly, "the top players" are going to work out which of you is the honest customer and which is trying to play games - at which point, you're "signalling honestly" again, at least as far as information leakage to the top players is concerned. But like a lot of discussions we have here, "beating the top players" isn't always the goal. Are you playing 60 boards against the #11 seed in the Spingold (or are you the #11 seed in the Spingold)? Fine. Are you playing the local club duplicate and trying to break 50% consistently? Take advantage of signalling to get your points against the field who won't "take[ you] apart" for it, do your best to get your 35-40% against the top players - and that includes giving them the overtrick from signalling, rather than the three overtricks from fooling partner into thinking it's safe to pitch from 8xxx and letting them run that suit as well. Are you the best player in the room? Well then you probably know which players don't look at your signals (so you can be honest), which do and can use them (so you "tell partner only what he needs to know"), and which are known for falsecarding games (most of whom assume "all good players" do it. So they'll misread your "honest" signals, as long as you're not "religiously honest"). But then you don't need my help, either.