Open position refers to the sum of holding multiple orders and empty orders without opening positions. Volume refers to the total trading volume of multiple orders and empty orders held at that time and all previously closed multiple orders and empty orders. For example, the total contract is 65,438+0,000 lots. At that time, we opened positions 1 1,500 lots, opened positions 1 1,000 lots and held positions of 2,500 lots. Before, because it was T+0, both long and short sides kept opening positions, and their sum was the volume.