What is Forex? FOREX (Foreign Exchange) is the market where one currency is traded for another. For example, in Europe the currency in circulation is Euro (EUR) and in the United States the currency is US Dollar (USD). An example of a currency trade is to buy the Euro while simultaneously selling the US Dollar. Foreign Exchange is one of the largest markets in the world. The foreign exchange market operates 24 hours per day throughout the week. When the European session ends the Asian session or US session start, all world currencies can be continuously traded. The average daily international foreign exchange trading volume stands at $4.0 trillion. Simply go on our website and start trading!