Day Trader’s Aftermarket Lounge 25 Mar 2020, page-33

Normally.....sheesh what's normal. You'd expect a few low spread low volume days, but we have bots and market maker smarties that can ride and drive volatility and supply and demand that would and could shake any retailing pawn.

Today for example I'd imagine a lot of burnt investor fingers, buying the open after a massive night in the US, thinking we are up 5-6%, maybe we get to 11%, the market has turned, the bottom is in.
Market makers have the ability and pockets to artificially create supply and demand, then throw in bot algorithms. We'll know the bottom has been hit days later. Guessing now is just guessing.
Personally I'm still looking for low spread low volume days. Opinion only