CFDs are a leverage product and can involve a significant risk of loss. Trading CFDs may not be suitable for all, therefore you should ensure that you understand the risks involved and take into account your individual circumstances.
Trader's Glossary

What is Currency Pair?

In Forex currencies are traded in pairs. Each currency is presented as a three letter abbreviation and is usually separated from the currency it is paired with by a space, a point, or a / symbol. EUR/USD refers to the Euro US Dollar currency pair. The first currency in the pair is known as the base currency. The second currency in the pair is known as the quote currency. The value of the pair is defined by how much of the quote currency is required to purchase a single unit of the base currency. So if EUR/USD is currently trading at 1.31 then this means that $1.31 is required to purchase €1.