Investors and traders can trade currencies around the world, in a commercial area, 24 hours a day in the foreign exchange market today. London, Japan and New York topped the three main currency traders from traders. These currencies are traded 24 hours a day. The only time the Stop Trading currencies is Friday when the Japanese market closes. There is a window one day after Japan closes before Europe comes Monday morning to open for business.The majority of operations comes from banks, brokerage houses and investment companies. Companies that buy and sell foreign currency in the course of their business as independent brokers and currency traders, represent a small part of trading foreign exchange currencies. The Forex market will continue to develop and grow at a steady pace in more than currency traders become aware of the potential to earn foreign exchange markets and increase capital. The Forex market reaches a daily average turnover 30 times higher than any other US market.Added in training to supply and demand, the Forex market relies on the huge scope for profit potential amongst currency brokers is steadily rising. The Forex market is also using the free floating system which is considered more practical for today's foreign exchange market may experience a change in the exchange rate to about 4.8 seconds. The Forex market is taking a tremendous role in the economy of the country, after the development of connective financial centers to a unified market. After extended worldwide, the Forex market reflects the continued growth of all international activities and their country. When you consider the size of the forex market, it is important to understand that all transactions are made with a future trading broker or independent broker, can lead to more transactions. This may be due to brokering activities that work to readjust their positions.Understanding your entire portfolio and its sensitivity to the unpredictability of the market is necessary to be an effective day trader. This is especially important when trading foreign exchange currencies, because these currencies are sold in pairs and not a single pair will trade completely independently. Understanding these correlations and how they can change will help you use them to your advantage to control your exposure.Correlations DefinedThere portfolio is a result of the interdependence of currency pairs. For example, if you were to trade the pound sterling (GBP) against the Japanese yen (JPY) or GBP / JPY, then you are negotiating a derivative of the USD / JPY and GBP pairs / USD . Consequently, GBP / JPY must be somewhat correlated to one or two other currency pairs. Even so, the interdependence between these currencies will result in more than the fact that they are in pairs. Although there are currencies that will move one behind the other, other currency pairs may move in different directions often results in a more complex force. In the world of finance, the correlation is a statistical measure of the relationship between two securities.Then is the correlation coefficient varies between -1 and 1. The correlation of 1 indicates that the two currency pairs may move in the same direction at about 100% of the time. Although correlations of -1 indicates that the two currency pairs are likely to move in the opposite direction to 100% of the time. If the correlation is zero, which indicates that the relationship between the currency pairs will be completely random.Correlations are not always stable. Correlations change, as the world economic system and other factors can change on a daily basis, making the ability to follow developments very significant correlations. Today correlations may not be in line with long-term correlations between pairs of two currencies. That is why it is suggested to take a look at the last six months of follow-correlation provide a clearer perspective on the average relationship between the two currency pairs. This change is the result of a variety of reasons - the most common reason being susceptibility to commodity prices, the divergent monetary policies and the unique political and economic circumstances of a currency pair