Stock index futures empty orders are the number of all empty orders, and the number of empty orders in stock index futures MINUS the number of multiple orders in the contract.

In futures trading, people who buy first and sell after the expected price rises are called bulls, and the contracts they hold are called multiple orders; On the other hand, a person sells first, expecting the price to fall, and then covering the position is called an empty order, and the contract he holds is called an empty order.

Short-term contract-long-term contract = open position

Clearance/total position * 100= clearance ratio.