https://tugbbs.com/forums/threads/what-is-robinhood-24-hour-trading-%EA%89%93%EA%8D%8F%EA%92%92%EA%92%92-%EA%8E%87%EA%82%A6%EA%8B%AA-%EA%82%B5%EA%82%A6%EA%8B%AA%EA%8D%9F.372143/