If you rotate into alts this cycle, what's your actual exit rule — not the entry?

every alt-season thread is about what to buy. nobody talks about the exit, which is where everyone i know actually gave the gains back last time. do you use a hard "sell into Xx" ladder, rotate back to BTC at a ratio level, or go time-based? trying to write the rule down now while i can still think straight, instead of improvising at the top. what actually worked for you vs what you wish you'd done.