How Forex Markets Work
The foreign exchange market is the largest financial market in the world. Here is what you need to know to understand how it operates.
What is the forex market?
Forex, short for foreign exchange, is the global marketplace where currencies are bought and sold. Unlike stock markets, forex has no central exchange. Trading happens over-the-counter, through a network of banks, brokers and electronic platforms that operate across different time zones.
The market runs continuously from Sunday evening to Friday night (GMT), cycling through the Sydney, Tokyo, London and New York sessions. The London and New York overlap is typically the most active period, when liquidity is highest and spreads tend to be tightest.
Participants range from central banks managing national currency reserves to commercial banks facilitating international trade, hedge funds speculating on currency movements and individual retail traders accessing the market through brokers.
Understanding currency pairs
Every forex trade involves two currencies. The first is the base currency and the second is the quote currency. When you see EUR/USD at 1.0850, it means one euro buys 1.0850 US dollars. The price you see is always expressed as how much of the quote currency you need to buy one unit of the base.
Major pairs involve the US dollar on one side and are the most liquid. Cross pairs, sometimes called minors, do not include the dollar. Exotic pairs combine a major currency with one from a smaller or emerging economy and typically have wider spreads and lower liquidity.
Majors
- EUR/USD
- GBP/USD
- USD/JPY
- USD/CHF
- AUD/USD
Crosses
- EUR/GBP
- EUR/JPY
- GBP/JPY
- AUD/JPY
Exotics
- USD/TRY
- EUR/ZAR
- GBP/SGD
- USD/MXN
Key terms every forex learner needs
Pip
The smallest standard price movement in a currency pair. For most pairs, a pip is the fourth decimal place. For USD/JPY, it is the second decimal place. Pips are how traders measure and communicate price changes.
Spread
The difference between the bid price (what you can sell at) and the ask price (what you can buy at). The spread is effectively the cost of entering a trade. Tighter spreads mean lower transaction costs.
Leverage
Leverage allows you to control a position larger than your deposited capital. A 30:1 leverage ratio means you can control £30,000 with £1,000. This amplifies both potential gains and potential losses significantly.
Margin
The amount of capital required to open and maintain a leveraged position. Margin is not a cost but a deposit held as collateral. If losses reduce your account below the required margin level, a margin call occurs.
Long / Short
Going long means buying a currency pair, expecting the base currency to rise against the quote. Going short means selling, expecting the base to fall. Both directions are equally accessible in forex markets.
Swap / Rollover
When a position is held overnight, a swap or rollover applies. This reflects the interest rate differential between the two currencies in the pair. Depending on direction, this can be a credit or a debit to your account.
Understanding and managing trading risk
Risk management is not a separate topic from trading, it is the foundation of it. Without a framework for managing risk, even a sound analytical approach can lead to significant losses.
Stop-Loss Orders
A stop-loss is an instruction to close a trade if price moves against you by a specified amount. It limits the maximum loss on any single trade and removes the need for constant monitoring.
Position Sizing
Deciding how large each trade is relative to your account balance is one of the most important decisions a trader makes. Risking a consistent, small percentage per trade helps preserve capital through losing periods.
Correlation Awareness
Some currency pairs move together. Trading EUR/USD and GBP/USD in the same direction simultaneously may mean you are more exposed than you realise, because both pairs often respond to the same dollar-related factors.
Economic Calendar Awareness
Major data releases can cause sharp, unpredictable price movements. Being aware of scheduled events like central bank meetings and employment reports allows you to manage exposure around those periods.
Two approaches to understanding price
Technical Analysis
Technical analysis uses price charts and mathematical indicators to identify patterns and potential future price behaviour. Tools include moving averages, RSI, MACD, Bollinger Bands and various chart patterns.
The underlying assumption is that all available information is already reflected in price, and that historical patterns have some tendency to repeat. Technical analysis is widely used in short to medium-term trading.
- Support and resistance levels
- Trend identification
- Momentum indicators
- Volume analysis
Fundamental Analysis
Fundamental analysis examines the economic factors that influence currency values. This includes interest rate decisions, inflation data, employment figures, GDP growth and geopolitical developments.
Central bank policy is the dominant fundamental driver for most major pairs. Understanding how the Federal Reserve, ECB, Bank of England and Bank of Japan communicate and act is central to fundamental forex analysis.
- Interest rate differentials
- Inflation and employment data
- Central bank communications
- Trade balance and capital flows
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