CFD is the abbreviation of Foreign Exchange, also known as FX, Foreign Exchange Market, or Currency Market. It is the largest global exchange market where currenciescan be traded. It is the biggest liquid financial market in the world where approximately 5Trillion dollars traded daily in the market.
Any country, firm, or person may participate in this market with the help of powerful software, e.g. (Meta Trader 4, Meta Trader 5, Web Portal, and cTrader etc.).
The CFD market open 24 hours a day, five days a week across the world, therefore you can buy or sell any pair of the existing currency at all times, day or night.
There are hundreds of currencies in the world. Each currency is abbreviated with specific three letters symbol like US dollar with USD, Euros with EUR, and British pound with GBP etc.