At present, the main types of foreign exchange transactions of banks are US dollar, Euro, British pound, Japanese yen, Swiss franc, Australian dollar, Canadian dollar, HKD and Singapore dollar. There are about 30 pairs of straight currency and cross currency trading targets.
PS: Currency pairs containing USD are regarded as direct orders, such as EUR/USD or USD/JPY. Currency pairs that do not contain US dollars are called cross orders, such as Euro/Australian Dollar.