Some investment management firms also have more speculative specialist currency overlay operations, which manage clients' currency exposures with the aim of generating profits as well as limiting risk. While the number of this type of specialist firms is quite small, many have a large value of assets under management and can ,therefore, generate large trades.
Either way you don’t have to provide the full currency value to open your position. Instead you put down a margin deposit, which is a fraction of the full value. And you don’t actually buy or sell any currency: you are opening a speculative position on the change in value of the forex pair. Your profit or loss is realised when you close your position by selling or buying.
At the end of 1913, nearly half of the world's foreign exchange was conducted using the pound sterling. 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. 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.
Before we proceed, we need to answer the question - what is the Forex market? Simply put, It is a global decentralised market for trading currencies. Moreover, it is the largest market in the world, processing trillions of dollars worth of transactions every day. The key participants in it are international banks, hedge funds, commercial companies, various central banks and, of course, retail FX brokers and investors.
The foreign exchange market is the "place" where currencies are traded. Currencies are important to most people around the world, whether they realize it or not, because currencies need to be exchanged in order to conduct foreign trade and business. If you are living in the U.S. and want to buy cheese from France, either you or the company that you buy the cheese from has to pay the French for the cheese in euros (EUR). This means that the U.S. importer would have to exchange the equivalent value of U.S. dollars (USD) into euros. The same goes for traveling. A French tourist in Egypt can't pay in euros to see the pyramids because it's not the locally accepted currency. As such, the tourist has to exchange the euros for the local currency, in this case the Egyptian pound, at the current exchange rate.