Day trading or stock exchange is among the popular financial markets in the world. However, in the recent decades, more and more individuals have begun exchanging their currencies in the currency trading market or foreign exchange market. 

Currency is defined as a unit of exchange used by a country, businesses and individuals for facilitation of market transaction which is the transfer of goods and services. It is deemed a form of money. Money, in broader sense, refers to anything that has a standard of value and a store of value that serves as a medium of exchange. Coins and bank notes are popular mediums of exchanges. They are also considered forms of currency.

Currency is money in circulation and is regarded as the dominant form of medium of exchange. However, differences in unit of currency may exist in one country to another. For example, the United States uses the US dollar as its unit of currency for the transaction of goods and services within its jurisdiction. It can also be used in international trading particularly in countries that use the US dollar as their unit of currency such as El Salvador, Ecuador, Panama and East Timor. Countries such as Japan, Switzerland and the United Kingdom use the Japanese yen, Swiss franc and British pound, respectively.

However, there are group of countries that use the same unit of currency. Countries that belong to the Eurozone uses one unit of currency which is the Euro while some African countries use the CFA franc.

There are currencies that are pegged to the value of other currencies. They are known as pegged currencies which are also called fixed currencies. Currencies that are pegged to other currencies include the CFA franc to the euro, Macau pataca to the Hong Kong dollar and Bahamas and Bermuda to the US dollar. Fixed currencies have a fixed exchanged rate which is a type of exchange rate regime.

The exchange rate regime is the method employed by a country to manage its currency in respect to the foreign exchange market and to foreign currencies. Another type of exchange rate regime is floating exchange rate. This type allows the currency of a country to float freely in the foreign exchange market.

Currency is popularly used for purchasing goods and/or services. A banknote or coins that have value can be exchanged to acquire material things or for payment of services and debts. It is also possible to trade currencies. People can trade their currencies to persons or organizations that are willing to trade their currencies.

Currency of one country which is different in value to the currency of another country is mostly traded such as the trading of US dollar to the Japanese yen. The US dollar is also traded to other popular currencies such as the euro, British pound and Canadian dollar. This is done to know the value of one currency when it is exchanged to another currency.

The fluctuation in value of most currencies in the foreign exchange market has made currency trading among the most exciting financial activities.

The foreign exchange market is regarded as the largest financial market in the world where trading can average in trillion dollars in volume. Trading of currencies can happen between large banks, multinational corporations, central banks, governments, currency speculators and other financial institutions. Currency trading also exists between individuals although they constitute a small fraction to the currency trading activity that takes place around the world.

Currency trading between individuals can be done through foreign exchange dealers or market makers. Large banks in the world are the largest currency traders.

Foreign exchange market is regarded as the most fluid market in the world. Trading happens 24 hours a day with the exception on weekends. For retail traders, it is now possible to trade currencies online. There are many sites that offer information about exchange rate trading as well as fundamentals and the activities that take place in currency trading.