Trade Responsibly. Trade Responsibly.CFDs are complex instruments and come with a high risk of losing money rapidly due to leverage. 84.60% of retail investor accounts lose money when trading CFDs with this provider. You should consider whether you understand how CFDs work and whether you can afford to take the high risk of losing your money.
FxPro Help Centre - Glossary

Reserve Currency

A reserve currency is a currency that is held by central and commercial banks in order to service debts, purchase commodities (which are ordinarily priced in the reserve currency) and influence exchange rates. This currency is held in reserve so as to minimise exchange rate risk. Since the end of the Second World War the US dollar has been the world’s reserve currency.