These are the most frequently traded currencies globally.
Examples include EUR/USD (Euro/US dollar), USD/JPY (US dollar/Japanese yen), (GBP/USD(British pound/US dollar) USD/CHF (US dollar/Swiss franc), USD/CAD (US dollar/Canadian dollar),
AUD/USD (Australian dollar/US dollar). Notice that every major currency pair has the US dollar on one side. There is a good reason: The dollar is the world’s leading reserve currency.