Because futures are settled once a day, the average price of your position the next day (average purchase price) is the average price of your position after the settlement the previous day, which changes every day. Mark-to-market profit and loss is the intraday floating profit and loss calculated according to the average position. The average opening price is the average opening price of the price you bought when you opened the position, and the floating profit and loss is calculated according to this price. For example, you bought 1 lot m 105 at 3000 yuan/ton and 3200 yuan/ton respectively, and yesterday's settlement price was 3300 yuan/ton, so today's average buying price (average position) is 3300 yuan/ton, and your average opening price is 365438+. As long as you don't change hands and positions, then your average opening price is fixed, and the average opening price changes every day.