The foreign exchange market (forex, FX, or currency market) is a global decentralized market for the trading of currencies.
Forex is the world’s most traded market, with an average turnover in excess of US$4 trillion per day. Compare this to the New York Stock Exchange, which has a daily turnover of around US$50 billion and it’s easy to see how the foreign exchange market is the biggest financial market in the world.
This investopedia article will tell you more and this article will tell you why 1875 was such an important date in the FX market and is also the site of my trading mentor (if you’re looking to learn the art of trading)
If you new and need a broker, I suggest IronFX