The essence of futures is to sign long-term contracts with others to buy and sell goods (or stock indexes, foreign exchange, interest rates) in order to achieve the purpose of maintaining value or making money.

1. After hanging out the liquidation order, a new bull will take over your liquidation order and clinch a deal. The position remains unchanged and the turnover increases.

This kind of transaction is called "changing hands" If your position order is changed to someone else's hand, the position will remain unchanged, and the transaction volume will be twice that of your closing order (your closing order+buying your long order).

2. Close positions, clinch a deal, lighten positions and increase the volume at the same time with the opponents' short positions.

This kind of transaction is called "double liquidation", and your long position is hedged with someone else's short position (the contract is gone), so the position is reduced by twice (your position+short position) and the trading volume is twice as much as yours (your position+short position).

The "position" here refers to the total position of bulls+bears;

"Volume" refers to the total trading volume of bulls+bears.

Position = long position+short position is right, but it is not (where long position is positive and short position is negative), and the position in the first case has not increased.

Because the essence of futures is to sign sales contracts, bulls and bears are corresponding. There is a cow in one hand and a bear in the other. If "bulls are positive and bears are negative", then bulls+bears are equal to 0.

It can be said that the open position is positive and the closed position is negative.

Both sides are opening positions and their positions have increased;

The two sides closed positions and reduced positions;

While opening positions, while closing positions, the positions remain unchanged.