When investing in forex, the currency pairs grab everyone’s attention. Because the investment goes into it. As a beginner, do you want to know what the currencies in the pair are called? Well, we’ll let you know. They are base and quote currencies. The one that appears on the left is called the base currency. This means the currency appearing on the right side is a quote currency. Popular currency pairs include EUR/USD, GBP/USD, USD/JPY, etc.