yesterday it started to fall from the start of Asian session to end of US session ie 24 hours. that is very painfully slow. usually, it can fall rapidly in an hour or 2. US index futures are behaving like an elderly folk going down the mountain and he took the whole day and a whole night to do it. It used to be a very strong fast stallion that can gallop rapidly down the mountain in less than 2 hours. very sad !!!! very sad !!!! please go down faster !!!!!!!
OP's premise is actually not true. Some of the most vicious gains are rallies from the bottom. Just check the chart of the flash crash, the market came back just as fast as it went down... Also google "V recovery".