Futures can accurately lock the price. As for the maturity cycle of futures options, it means that when futures options expire, they will continue to move to the next period. The expiration month refers to the expiration month. The expiration month of 1 month revolving option (futures) is to carry forward the futures or options that expire in 1 month to the next futures option. Your question is not very clear in words. I will answer you according to your meaning.