It is the profit or loss caused by the difference between your opening price and the current price. For example, if you open a position at 4,600 and buy 1 lot of soybeans, if the current price is 4,630, you will earn 30 points (300 yuan), and if the current price is 4,590, you will lose 10 points (100 yuan). During the opening period, the price is constantly changing, so the profit and loss are also changing with the market price, so it is called floating (mark-to-market) profit and loss. In fact, even if your account gains or loses after the close of the day, as long as your position is not closed, your profit or loss is uncertain, so it is called floating (market-marked) profit or loss.