For the counterparty of the transaction, if both sides don't close their positions after the close, it must be a profit and a loss. There is only one market price. After a certain price is settled, the contract price between the buyer and the seller is determined. When the price fluctuates and deviates from the transaction price, there will definitely be profits and losses, provided that both parties have not closed their positions. When the broadcast time is different, it may cause both parties to make a profit or both parties to lose money.