 For example, if you buy the same stock in three trades on the same day, and sell them all in one trade, that can be considered one day trade, or three day trades.If you buy stock in one trade and sell the position in three trades, that is generally considered as one day trade if all trades are done on the same day.Three more day trades in the next four business days will subject your account to restrictions (you can only close existing positions or purchase with available cash up front) for 90 days, or until you deposit enough to have $25,000 in your account, whichever comes first.