The Foreign Exchange Market, commonly known as the FOREX or FX, is the largest international financial market. The average trading volume exceeds $2 Trillion per day [1]. A great majority of the trading volume is based on speculation. The Forex is heavily influenced by interest rate expectations. It is open for 24 hours for six days a week. It opens on Sunday at 5 pm EST and closes Friday at 4:30 pm EST [2].
Sources
1. Galant, Mark. Currency Trading for Dummies. 2007.
2. Dicks, James. Forex Made Easy. 2004.