Major Forex Currency

currency
The fact or quality of being generally accepted or in use
the metal or paper medium of exchange that is presently used
The time during which something is in use or operation
general acceptance or use; "the currency of ideas"
currentness: the property of belonging to the present time; "the currency of a slang term"
A system of money in general use in a particular country

major
have as one's principal field of study; "She is majoring in linguistics"
An army officer of high rank, in particular (in the US Army, Air Force, and Marine Corps) an officer ranking above captain and below lieutenant colonel
A system of change-ringing using eight bells
of greater importance or stature or rank; "a major artist"; "a major role"; "major highways"
A major key, interval, or scale
a commissioned military officer in the United States Army or Air Force or Marines; below lieutenant colonel and above captain

forex
The foreign exchange market (forex, FX, or currency market) is a worldwide decentralized over-the-counter financial market for the trading of currencies.
The foreign exchange (also known as "forex" or "FX") market is the place where currencies are traded. The overall forex market is the largest, most liquid market in the world with an average traded value that exceeds $1.9 trillion per day and includes all of the currencies in the world.
The market in which participants are able to buy, sell, exchange and speculate on currencies. The forex markets is made up of banks, commercial companies, central banks, investment management firms, hedge funds, and retail forex brokers and investors.
Foreign exchange