Futures auction sale: commodity A futures market price 100 yuan. Now the pending order is short: pending order 90 yuan, short. Then pay the bill closest to you. For example, the current market price 100, the buying price is 99, and your short price is 99.

Similarly, the futures price of commodity B fluctuates, and the market price is 100. Now more pending orders: pending orders 1 10 yuan, more pending orders. If the market price is 100 and the purchase price is 99, then your buyer is 100 instead of10. Unless 100 doesn't have a list, the transaction is made with 10 1, and so on.