The word "Forex" is short name for FOReign EXchange, it is also described as "FX". The forex currency market is one of the world's largest financial market where one currency can be traded for another. It is a non-stop cash operative marketplace where various currencies are traded off and exchanged through various brokers.
The interbank currency market is a 24 hour market that traders gather from anywhere in the world. In principle, the forex market opens up in Asia/Australia and closes down in the USA during which various types of traders such as banks, speculators and brokers put an effort to profit from the trading markets.
As of April 2010, following are the most traded currencies by percentage of daily share: