A market order in TRA at that time of the day could easily (and did) move the stock 4 points. I agree that these moves can create good short term entries, and I trade them every day.
MTL is getting smoked due to comments from Russia.
Check the T&S and I bet you'll see a large order getting moved down until it was fully executed at the bottom. These bear trap trades were the main strategy we used to trade at my old prop firm.
I checked the T&S. Hard to tell if there was an offer stepping down the whole way (doubtful), but there were some pretty big takes right at the bottom below $47.