You can only go to the websites of the three major exchanges or the futures market software to find out the minimum margin ratio charged by the exchanges. As for the margin ratio of futures companies, it is based on the minimum margin scale charged by futures companies on the exchange plus a certain proportion. As for this ratio, the standard of each futures company is different, because the margin ratio is also a means to compete with customers, so each futures company will not announce it unless you become their customer. However, there will be hints in the quotation software of some companies. You can only check the margin ratio of each futures company on the website of one futures company.