Foreign exchange, also known as forex or FX, refers to the conversion of one currency into another. It is a vital aspect of international trade and finance, as countries with different currencies need to exchange them to conduct business. The foreign exchange market is the largest and most liquid financial market in the world, with an average daily trading volume of over $5 trillion. This market involves the buying and selling of currencies, with the exchange rates constantly fluctuating based on supply and demand. It is crucial for individuals and businesses to understand and manage foreign exchange risk, as changes in exchange rates can have a significant impact on their finances.