Answer: Situation 1: There are situations where you can't buy or sell. This situation is more likely to appear in markets and contracts with poor liquidity, but generally everyone is the main contract, so the situation of poor liquidity does not exist. Unless the daily limit is blocked, this extreme market rarely appears. Case 2: There is also a price difference between the order you submitted and the current price, so it is impossible to close the deal. If it is a stop loss, you need to withdraw the order and re-place the order.
Question 2: If there is no such situation, how is hedging realized? I mean, if the buyer doesn't sell it, isn't it helpless for the seller not to buy it? Please explain, thank you! )
A: If it is not a legal person, there is no right of delivery. Before delivery, the position must be closed. If you don't close your position, the exchange will close it forcibly. After the forced liquidation, the exchange will confiscate the profits and the holders will bear the losses. So, it will definitely be washed away.