By contrast, the AUD/NZD moves by 50-60 pips a day, and the USDHKD currency pair only moves by an average of 32 pips a day (when looking at the value of currency pairs, most will be listed with five decimal points. A 'Pip' is 0.0001. So, if the EUR/USD moved from 1.16667 to 1.16677, that would represent a 1 pip change). The major Forex pairs tend to be the most liquid, and therefore provide the most opportunities for short-term trading.
Investment management firms (who typically manage large accounts on behalf of customers such as pension funds and endowments) use the foreign exchange market to facilitate transactions in foreign securities. For example, an investment manager bearing an international equity portfolio needs to purchase and sell several pairs of foreign currencies to pay for foreign securities purchases.
For traders—especially those with limited funds—day trading or swing trading in small amounts is easier in the forex market than other markets. For those with longer-term horizons and larger funds, long-term fundamentals-based trading or a carry trade can be profitable. A focus on understanding the macroeconomic fundamentals driving currency values and experience with technical analysis will help new forex traders to become more profitable.
Day trading can take place in any market, but is commonly referred to in the context of either the Forex trading market or the stock trading market. In order to be successful as a Forex day trader, you need to have a decent amount of capital, and a good amount of knowledge of the market behind you. However, having this doesn't necessarily guarantee success. This is especially true when 'invisible hands' are at work, and when the prices fluctuate enormously during intraday Forex trading.
Governments / Central banks – A country’s central bank can play an important role in the foreign exchange markets. They can cause an increase or decrease in the value of their nation’s currency by trying to control money supply, inflation, and (or) interest rates. They can use their substantial foreign exchange reserves to try and stabilize the market.
Security: Will your funds and personal information be protected? A reputable Forex broker, and a good Forex trading platform will have measures in place to ensure the security of your information, along with the ability to backup all key account information. They will also segregate your funds from their own funds. If a broker cannot demonstrate the measures they will take to protect you and your account balance, it would be best to find another broker.
Forex is the one financial market that never sleeps, meaning you can trade at all hours of the day (or night). Unlike the world's stock exchanges, which are located in physical trading rooms like the New York Stock Exchange or the London Stock Exchange, the Forex market is known as an 'Over-the-counter market' (or OTC). This means that the trades take place directly between the parties holding the currencies, rather than being managed via an exchange.

In 1876, something called the gold exchange standard was implemented. Basically it said that all paper currency had to be backed by solid gold; the idea here was to stabilize world currencies by pegging them to the price of gold. It was a good idea in theory, but in reality it created boom-bust patterns which ultimately led to the demise of the gold standard.
Once Nixon abolished the gold standard, the dollar's value quickly plummeted. The dollar index was established to give companies the ability to hedge this risk. Someone created the U.S. Dollar Index to give them a tradeable platform. Soon, banks, hedge funds, and some speculative traders entered the market. They were more interested in chasing profit than in hedging risks. 
For the past 300 years, there has been some form of a foreign exchange market. For most of U.S. history, the only currency traders were multinational corporations that did business in many countries. They used forex markets to hedge their exposure to overseas currencies. They could do so because the U.S. dollar was fixed to the price of gold. According to the gold price history, gold was the only metal the United States used to back up the value of the nation’s paper currency.

Major Currency — currencies from the world’s most developed economies including Europe, Japan, Canada, and Australia — represent the most heavily traded and liquid currency markets for any forex trader. A major currency pair is created when one of these currencies is traded against the U.S. dollar. Examples include Euro vs. the U.S. Dollar (EUR/USD) and the U.S. Dollar vs. the Canadian Dollar (USD/CAD). Their availability on a forex brokerage is essential.

Because the functionality of the trading platform has such a huge impact on your experience trading forex, take the time to try before you buy. Explore the features of your top two or three brokerages, either by diving deeply into their site’s introductory info or by running a demo of their platforms. The platform that’s best for you will feel intuitive and clear: You shouldn’t have to scour the site to find basic functions.
In the futures market, futures contracts are bought and sold based upon a standard size and settlement date on public commodities markets, such as the Chicago Mercantile Exchange. In the U.S., the National Futures Association regulates the futures market. Futures contracts have specific details, including the number of units being traded, delivery and settlement dates, and minimum price increments that cannot be customized. The exchange acts as a counterpart to the trader, providing clearance and settlement.