Forex is the market in which clients can buy, sell, exchange, and speculate on currencies. The forex market is made up of banks, commercial companies, central banks, investment management firms, hedge funds, and retail forex brokers and investors. The currency market is considered to be the largest financial market with over $5 trillion in daily transactions, which is more than the futures and equity markets combined. This is what makes the forex market so interesting. The foreign exchange market is not dominated by a single market exchange, but a global network of computers and brokers from around the world. Forex brokers act as market makers as well and may post bid and ask prices for a currency pair that differs from the most competitive bid in the market.
The forex market is made up of two levels; the interbank market and the over-the-counter (OTC) market. The interbank market is where large banks trade currencies for purposes such as hedging, balance sheet adjustments, and on behalf of clients. The OTC market is where individuals trade through online platforms and brokers.
From Monday morning in Asia to Friday afternoon in New York, the forex market is a 24-hour market, meaning it does not close overnight. This differs from markets such as equities, bonds, and commodities, which all close for a period of time, generally in the New York late afternoon.
However, as with most things, there are exceptions. Some emerging market currencies close for a period of time during the trading day.