Set it up when you think it is the peak. i put some range on upper price but i think it is best if you put upper price = current price, and lower price = weekly/monthly low.
Let it run for few days before placing a stop loss. my previous reversed grid triggered a stop loss too soon and im barely getting any decent accumulation. but it does pumping when that happened so i redo the reversed grid again at higher price than before. then it dips again after that