This is because your concepts are confused with each other. In stock index futures, only buying can sell. Every transaction must have a buyer and a seller with the corresponding price, so you must find the corresponding seller or buyer if you want to close the transaction. Therefore, the number of sellers and buyers in the trading list in futures is the same. If your problem is that the long and short sides are not equal, it is because if the market is improving, people will be willing to do more, so the price will continue to rise, but the actual contract is a buyer and a seller, and vice versa.

If you are asking about the difference between bulls and bears displayed on trading software, it is because many orders have not been sold. When the price exceeds the price of your multiple orders, your pending orders may not be sold.