In the real-time market information released by the exchange, there are "volume" and "total position" columns. The meaning of "total position" has been explained above, and "volume" refers to the cumulative total number of transactions from the beginning of the day to the time.

All transactions must be bought and sold, and the two are absolutely equal in quantity. Unilateral calculation, for example, if someone bids at 1300 to buy 10 CSI 300 index futures, and someone bids at 1300 to sell 10 CSI 300 index futures, and 10 trades, then the trading volume is 10 lots.

Similarly, the bilateral statistics of "total positions" are also calculated by adding the open positions of long positions and short positions. In the domestic futures market, "volume" and "total position" are bilateral statistics, while overseas, they are basically unilateral statistics.