Nowadays, most of the varieties are charged bilaterally by the exchanges

There are also four or five varieties that are unilateral for intraday trading

There may be some varieties that will resume single-sided trading this year. Side discounts

It depends on the policies of the exchange

For example, aluminum, zinc, corn, etc. are still one-sided

If you have any questions about futures, you can send a private message

The fees charged are the lowest standards