It would have been a T-trade.

It could have been shorts arranging a deal to cover when it became obvious they were not going to get it below .0042 - which I believe was the low yesterday as well.

I wasn't watching at all yesterday or much today as I had a lot of other movers.

So I don't know the strength of the ask buying pressure to get the reversal - apart from ever since it last got above .0040, those reversing it by ask buying to get 5 to 7 ticks to flip have been beating those trying to take it down.

Although T-Trades are sometimes dilution, that qty would have been way more than any bid at a single price point.