Reverse Grid Bot is the same as normal Grid bot, but the difference is in reverse grid bot, the notation of profit and investment are in Token form, not in the base form. For example. in ADA/USDT pair, normal grid bot will require USDT and all the profit and calculation is in USDT. Meanwhile, in reverse grid, it requre ADA and all calculation is in ADA. They work the same, buy low , and sell high.
Meanwhile in margin grid bot short, you will loan token with collateral. If the token price is going down, you only need to buy it back with cheaper price, thats why margin grid bot short is profitting from decreasing market price.