In the market information released by the exchange, there is a special "total position" column.
The change of total positions reflects investors' interest in contracts and is an important indicator for investors to participate in contract transactions. If the total positions keep increasing, it shows that both sides are building positions, investors' interest in contracts is increasing, and OTC funds are pouring into contract transactions; On the contrary, when the total position decreases, it shows that both parties are closing their positions and traders' interest in the contract is declining. On the other hand, when the trading volume increases, the total position changes little, indicating that the market is dominated by changing hands.