As of 2016, $5.1 trillion are traded on the FX markets, daily. Forex trading daily volume is in fact, 4 times the global GDP.
60% of all Forex transactions are conducted in either the UK (41%) or the United States (19%).
The U.S. Dollar accounts for over 87% of the total volume of FX traded daily. EUR is the second most popular currency traded daily, at 33.4%.
Forex market never sleeps on week days, as trading on the FX market begins when the market in Sydney opens at 22:00 GMT on Sunday and the markets close at 22:00 GMT Friday (New York).