The major aim of the foreign currency exchange market is to earn money but it's different from other equity markets. There are numerous technical terminologies and strategies a dealer must know to take care of currency exchange. To find more details about foreign currency read this post here.
In the Currency Exchange market, the commodity that is traded is the foreign exchange. These foreign currencies are always priced in pairs. The value of one unit of foreign money is always expressed in terms of another foreign currency.
Thus all transactions include the sale and purchase of two foreign currencies at exactly the exact same time. You need to purchase a currency only once you anticipate the value of the currency to gain in the future.
If it increases in value, you need to buy the currencies you have purchased to make your gain. When you buy or sell money then the trade is known as open commerce or in open position and can be closed only once you sell or purchase an equivalent quantity of currency.
You also have to understand how the monies are quoted in the currency exchange market. They are quoted in pairs as USD/JPY. The first currency is the base currency and the second one is the quote currency. The quoted value depends upon the currency conversion rates between the 2 currencies under consideration. Mostly the USD is going to be utilized as based currency but occasionally euro, pound sterling can also be utilized.
The profit of the agent is dependent upon the bid and the asking price. The bid is the price the agent is prepared to pay to purchase base money for exchanging the quotation currency.