The Foreign Exchange Money Market, usually referred to as Forex of FX for the sake of 
brevity, is by far the largest market in the world for the purpose of speculating on the future value of financial instruments.
Forex currently accounts for almost four trillion dollars of volume a day. That’s a 4 followed by twelve zeros. Estimating the world population at seven billion, Forex volume is equivalent to just under $600 a day for every person on earth. This astronomical figure completely dwarfs the combined volume for the world’s stocks and futures markets by a three to one margin. If you were to lay four trillion dollars end-to-end, you could go to the moon and back over 762 times!
Private and government banks, businesses, and individuals trade all the world’s various currencies twenty four hours a day, six days per week, across three major market regions: Asia, Europe, and America.