Generally speaking, you trade in different currencies according to the exchange to which the external contract belongs. For example, if you trade Hong Kong futures, such as Hang Seng Index futures, you trade Hong Kong dollars. If it is American futures, such as crude oil futures, it will be done in dollars. If it is British futures, such as London copper, it will be made in pounds. Due to the implementation of foreign exchange control in China, there is a limit on the amount that needs to be converted into foreign currency when making foreign orders. So if you really want to invest in foreign futures, it is recommended to use a foreign currency bank card.