Direct quotation for dollars is called direct quotation. Generally speaking, direct quotations are made for six major currencies, namely, US dollar against Japanese yen, US dollar against Australian dollar, Euro against US dollar, Swiss franc against British pound and Canadian dollar. Cross is a comparison of exchange rates between different straight currencies. Because the dollar is a local currency, they have to exchange it in dollars, but they can't exchange it directly with other countries' currencies. It can be understood that the straight plate is a direct exchange between dollars and currencies, while the fork plate is an exchange between exchange rates. So separate the straight plate from the fork plate.