You mean the foreign exchange market in futures software. In the international market, almost all currencies have exchange rates against the US dollar, which is generally called direct exchange. The exchange rate of one non-US dollar currency to another non-US dollar currency needs to be calculated by these two exchange rates against the US dollar, and this calculated exchange rate is called the cross exchange rate. A remarkable feature of cross exchange rate is that one exchange rate involves the exchange rate between two non-US dollar currencies. Currency pairs that use cross exchange rates become cross exchange rates in foreign exchange transactions, such as pound against yen. If foreign exchange is futures, then cross foreign exchange futures are futures with a certain cross exchange rate as the subject matter, hehe.