What Is the Forex Market? The foreign exchange market is where currencies are traded. Currencies are important because they allow us to purchase goods and services locally and across borders. International currencies need to be exchanged to conduct foreign trade and business. If you are living in the United States and want to buy cheese from France, then either you or the company from which you buy the cheese has to pay the French for the cheese in euros (EUR). This means that the U.S. importer would have to exchange...