You have to pay futures in the current period. When futures are bought and sold on the same day, a handling fee will be charged according to the transaction amount. No matter whether you buy or sell on the same day or before, as long as there is a transaction amount, you need to charge a handling fee. Futures and spot are completely different. Spot is a real tradeable commodity. Futures are not mainly commodities. They are standardized tradable contracts based on commodities such as cotton, soybeans and oil, and financial assets such as stocks and bonds.