How to determine the transaction price of futures matching in futures trading?

The premise of matching futures transactions is that the buying price must be greater than or equal to the selling price. When the buying price is equal to the selling price, the transaction price of futures trading is the buying price or selling price, and there is no doubt about this. The question is how to determine the transaction price of futures trading when the buying price is greater than the selling price?
When the computer is matching, it actually determines the latest futures transaction transaction price based on the previous futures transaction transaction price. If the transaction price of the previous futures transaction is lower than or equal to the selling price, the transaction price of the latest futures transaction is the selling price; if the transaction price of the previous futures transaction is higher than or equal to the buying price, the transaction price of the latest futures transaction is Bid price; if the transaction price of the previous futures transaction is between the selling price and the purchase price, the transaction price of the latest futures transaction is the transaction price of the previous futures transaction. The following may wish to illustrate it with an example.
The buyer's bid is 1399 points, and the seller's bid is 1397 points. If the transaction price of the previous futures transaction is 1397 points or below, the transaction price of the latest futures transaction is 1397 points; if the transaction price of the previous futures transaction is 1399 points or above, the transaction price of the latest futures transaction is 1399 points; if If the transaction price of the previous futures transaction is 1398 points, then the transaction price of the latest futures transaction is 1398 points.
The advantage of this matching method is that it not only shows fairness, but also makes the transaction price of futures trading relatively continuous, avoiding unnecessary irregular jumps.
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