In developed nations, the state control of the foreign exchange trading ended in 1973 when complete floating and relatively free market conditions of modern times began.[48] Other sources claim that the first time a currency pair was traded by U.S. retail customers was during 1982, with additional currency pairs becoming available by the next year.[49][50]

At the end of 1913, nearly half of the world's foreign exchange was conducted using the pound sterling.[24] The number of foreign banks operating within the boundaries of London increased from 3 in 1860, to 71 in 1913. In 1902, there were just two London foreign exchange brokers.[25] At the start of the 20th century, trades in currencies was most active in Paris, New York City and Berlin; Britain remained largely uninvolved until 1914. Between 1919 and 1922, the number of foreign exchange brokers in London increased to 17; and in 1924, there were 40 firms operating for the purposes of exchange.[26]
Basically, the Forex market is where banks, businesses, governments, investors and traders come to exchange and speculate on currencies. The Forex market is also referred to as the ‘Fx market’, ‘Currency market’, ‘Foreign exchange currency market’ or ‘Foreign currency market’, and it is the largest and most liquid market in the world with an average daily turnover of $3.98 trillion.
During the 15th century, the Medici family were required to open banks at foreign locations in order to exchange currencies to act on behalf of textile merchants.[10][11] To facilitate trade, the bank created the nostro (from Italian, this translates to "ours") account book which contained two columned entries showing amounts of foreign and local currencies; information pertaining to the keeping of an account with a foreign bank.[12][13][14][15] During the 17th (or 18th) century, Amsterdam maintained an active Forex market.[16] In 1704, foreign exchange took place between agents acting in the interests of the Kingdom of England and the County of Holland.[17]

Knowing how the industry is mapped out is important, because the collective combination of all participants creates the market you trade in. The relative weight of the trading party to the market is measured by how much money that party manages – from billion dollar hedge funds and investment banks, to private traders with a few thousand dollars in action.
Many people like trading foreign currencies on the foreign exchange (forex) market because it requires the least amount of capital to start day trading. Forex trades 24 hours a day during the week and offers a lot of profit potential due to the leverage provided by forex brokers. Forex trading can be extremely volatile and an inexperienced trader can lose substantial sums.
It is estimated that in the UK, 14% of currency transfers/payments are made via Foreign Exchange Companies.[65] These companies' selling point is usually that they will offer better exchange rates or cheaper payments than the customer's bank.[66] These companies differ from Money Transfer/Remittance Companies in that they generally offer higher-value services. The volume of transactions done through Foreign Exchange Companies in India amounts to about US$2 billion[67] per day This does not compete favorably with any well developed foreign exchange market of international repute, but with the entry of online Foreign Exchange Companies the market is steadily growing. Around 25% of currency transfers/payments in India are made via non-bank Foreign Exchange Companies.[68] Most of these companies use the USP of better exchange rates than the banks. They are regulated by FEDAI and any transaction in foreign Exchange is governed by the Foreign Exchange Management Act, 1999 (FEMA).
There are actually three ways that institutions, corporations and individuals trade forex: the spot market, the forwards market and the futures market. The forex trading in the spot market always has been the largest market because it is the "underlying" real asset that the forwards and futures markets are based on. In the past, the futures market was the most popular venue for traders because it was available to individual investors for a longer period of time. However, with the advent of electronic trading and numerous forex brokers, the spot market has witnessed a huge surge in activity and now surpasses the futures market as the preferred trading market for individual investors and speculators. When people refer to the forex market, they usually are referring to the spot market. The forwards and futures markets tend to be more popular with companies that need to hedge their foreign exchange risks out to a specific date in the future.