Traders at the banks would collaborate in online chat rooms. One trader would agree to build a huge position in a currency, then unload it at 4 p.m. London Time each day. That's when the WM/Reuters fix price is set. That price is based on all the trades taking place in one minute. By selling a currency during that minute, the trader could lower the fix price. That's the price used to calculate benchmarks in mutual funds. Traders at the other banks would also profit because they knew what the fix price would be.
The value of a country's currency depends on whether it is a "free float" or "fixed float". Free floating currencies are those whose relative value is determined by free market forces, such as supply / demand relationships. A fixed float is where a country's governing body sets its currency's relative value to other currencies, often by pegging it to some standard. Free floating currencies include the U.S. Dollar, Japanese Yen and British Pound, while examples of fixed floating currencies include the Chinese Yuan and the Indian Rupee.
Forex trading as it relates to retail traders (like you and I) is the speculation on the price of one currency against another. For example, if you think the euro is going to rise against the U.S. dollar, you can buy the EURUSD currency pair low and then (hopefully) sell it at a higher price to make a profit. Of course, if you buy the euro against the dollar (EURUSD), and the U.S. dollar strengthens, you will then be in a losing position. So, it’s important to be aware of the risk involved in trading Forex, and not only the reward.
Forex hedging: Hedging is a risk management technique where a trader can offset potential losses by taking opposite positions in the market. In Forex, this can be done by taking two opposite positions on the same currency pair (e.g. by opening a long trade and a short trade on the GBP/USD currency pair), or by taking opposite positions on two correlated currencies.
In the forex market currencies trade in lots, called micro, mini, and standard lots. A micro lot is 1000 worth of a given currency, a mini lot is 10,000, and a standard lot is 100,000. This is different than when you go to a bank and want $450 exchanged for your trip. When trading in the electronic forex market, trades take place in set blocks of currency, but you can trade as many blocks as you like. For example, you can trade seven micro lots (7,000) or three mini lots (30,000) or 75 standard lots (750,000), for example.
Economic numbers: While economic numbers can certainly reflect economic policy, some reports and numbers take on a talisman-like effect: the number itself becomes important to market psychology and may have an immediate impact on short-term market moves. "What to watch" can change over time. In recent years, for example, money supply, employment, trade balance figures and inflation numbers have all taken turns in the spotlight.
Both types of contracts are binding and are typically settled for cash for the exchange in question upon expiry, although contracts can also be bought and sold before they expire. The forwards and futures markets can offer protection against risk when trading currencies. Usually, big international corporations use these markets in order to hedge against future exchange rate fluctuations, but speculators take part in these markets as well.