I see what you mean by no short squeeze until >21. I was amazed at the resiliancy of the shorts. They were completely undeterred by the brief rally. It seems like they were pulling shares out of the sky in the last half hour. I have no idea where they got the shares from, as every bid block of two- to five-thousand was met head on. They slowly tipped the scale.
As President TR might have said, "it was NOT bully for us longs."