In July 1944, representatives from the Allied nations brought forward the importance of a monetary system which would fill the gap left behind the gold standard. They arranged a meeting at Bretton Woods, New Hampshire, to set up a system that would be called the Bretton Woods system of international monetary management. The creation of Bretton Woods System led to the formation of fixed exchange rates as the United States defined the value of US dollar in terms of gold equal to $ 35 for one ounce and other countries pegged their currencies to the dollar. The US dollar became the main reserve currency and the only currency that was backed by gold. However, in 1970 the U.S. gold reserves were so depleted that it was impossible for the U.S. treasury to cover all the reserves held by foreign central banks.
Forex pairs trade in 1000, 10,000 and 100,000 units, called micro, mini and standard lots. When starting out in forex day trading it's recommended traders open a micro lot account. Trading micro lots allows for more flexibility so risk remains below 1% of the account on each trade. For example, a micro-lot trader can buy $6,000 worth of currency, or $14,000, or $238,000 but if they open a mini lot account they can only trade in increments of $10,000, so $10,000, $20,000, etc. If trading standard lots, a trader can only take positions of $100,000, $200,000, etc.
The four major forex exchanges are located in New York, London, Singapore and Tokyo. When more than one exchange is simultaneously open, this not only increases trading volume, it also spikes volatility (the extent and rate at which equity or currency prices change), which likewise benefits forex traders. This may seem paradoxical. After all, investors generally fear market volatility. But in the forex game, greater volatility translates to greater payoff opportunities.
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.