Foreign Currency Exchange (Forex or FX) is the marketplace where one can buy/sell/exchange one currency against another. The market participants are investment management firms, central banks, commercial banks, exporters, importers, brokers, traders, hedge funds, individuals, tourists, exchanges and money changers. The market is open for 24 hours from Monday to Friday. In India, the market hours are usually 9am to 5pm, but outside India, a Non-Deliverable Forward (NDF) Market works round the clock for six days a week.