The main participants in this market are the larger international banks. Financial centers around the world function as anchors of trading between a wide range of multiple types of buyers and sellers around the clock, with the exception of weekends. Since currencies are always traded in pairs, the foreign exchange market does not set a currency's absolute value but rather determines its relative value by setting the market price of one currency if paid for with another. Ex: US$1 is worth X CAD, or CHF, or JPY, etc.
Similarly, if you wanted to purchase 3,000 USD with Euros, that would cost 2,570 EUR. With a leverage rate of 1:30, however, you could access 3,000 USD worth of the EUR/USD currency pair as a CFD with just 100 USD. The best part, however, is that the size of the potential profit a trader could make is the same as if they had invested in the asset outright. The risk here is that potential losses are magnified to the same extent as potential profits.
Individual retail speculative traders constitute a growing segment of this market. Currently, they participate indirectly through brokers or banks. Retail brokers, while largely controlled and regulated in the US by the Commodity Futures Trading Commission and National Futures Association, have previously been subjected to periodic foreign exchange fraud.[63][64] To deal with the issue, in 2010 the NFA required its members that deal in the Forex markets to register as such (I.e., Forex CTA instead of a CTA). Those NFA members that would traditionally be subject to minimum net capital requirements, FCMs and IBs, are subject to greater minimum net capital requirements if they deal in Forex. A number of the foreign exchange brokers operate from the UK under Financial Services Authority regulations where foreign exchange trading using margin is part of the wider over-the-counter derivatives trading industry that includes contracts for difference and financial spread betting.
By shorting €100,000, the trader took in $115,000 for the short-sale. When the euro fell, and the trader covered their short, it cost the trader only $110,000 to repurchase the currency. The difference between the money received on the short-sale and the buy to cover is the profit. Had the euro strengthened versus the dollar, it would have resulted in a loss.

Forex is a portmanteau of foreign currency and exchange. Foreign exchange is the process of changing one currency into another currency for a variety of reasons, usually for commerce, trading, or tourism. According to a recent triennial report from the Bank for International Settlements (a global bank for national central banks), the average was more than $5.1 trillion in daily forex trading volume.