Answer
normal grid = earn usdt, good for bullish
reverse grid = earn coin, good for bearish
what’s interesting about reverse is that you can start it without hodling any coins at all. so the price dip wont affect your usdt. you only buy the dips and sell it higher. even if it dips way further, the fluctuations will bring the breakeven price down much faster.
my mistake is that i put my upper too far so it took way longer to bring down the breakeven price due to im holding coins for upper range.