Yes, you can day trade on Moomoo. But if you want to protect yourself from being marked as a pattern day trader, you can also turn on pattern day trading protection. The system will notify you when you make a second or third day trade during five trading days when this feature is on. The platform will, in theory, stop you before making trades that may mark you as a pattern day trader. However, Moomoo states the protection cannot guarantee you won’t be marked as a pattern day trader.