It's not a real trade, at 0.2428. It's a T-trade that usually takes place after market close. It's a predetermined price. The market maker shorts the stock, legitimately, and after he is done selling 160k he will buy it from the customer for that price of 0.2428. You can't compete with the market maker. Although it is possible in theory (perhaps) to get matched, practically it is almost impossible. You can get it cheaper if the market maker has to short it cheaper. But not in this case as there were sufficient buyers at 0.25+