Some facts about FOREX
Composite Index of Leading Indicators. The Conference Board; around the 20th of each month, 10:00am EST.
Gregory Millman reports comparing speculators to "vigilantes" who simply help "enforce" international agreements and anticipate the effects of basic economic "laws" in order to profit.
Several countries can use the same name, each for their own currency (e.g. Canadian dollars and United States dollars), several countries can use the same currency (e.g. the euro), or a country can declare the currency of another country to be legal tender.