The forex exchange market is where currencies trade against each other, twenty-four hours a day across major financial centres worldwide

The foreign exchange market, or forex, is a decentralised network where banks, investment firms, corporations, and individual traders buy and sell currencies. Unlike stock exchanges, which operate from a physical location during set hours, forex trades over-the-counter through electronic networks. The market never closes — it moves continuously from Tokyo to London to New York and back again, following the sun across time zones.

When you exchange dollars for euros at an airport, you are participating in forex. When a US company pays a supplier in Japan, forex is involved. When a central bank adjusts interest rates to influence its currency's value, forex traders react within seconds. The market exists because people and organisations need to convert one currency into another, and because the rate at which they can do so changes constantly based on supply, demand, and economic conditions.

Key Takeaways

  • Forex trades twenty-four hours a day, five days a week across multiple time zones, with no single central exchange.
  • Currency pairs are quoted as two currencies — the base currency and the quote currency — with the price showing how much of the quote currency one unit of the base currency costs.
  • The forex market is the largest financial market by trading volume, with trillions of dollars exchanged daily.
  • Prices move based on interest rates, inflation, political events, economic data releases, and shifts in supply and demand for currencies.
  • Forex trading carries significant risk and is not the same as currency exchange for travel or business purposes.

How currency pairs work in forex

Every forex transaction involves two currencies at once, written as a pair. The most common is EUR/USD, which means euros and US dollars. The first currency listed is the base currency, and the second is the quote currency. The price tells you how much of the quote currency you need to buy one unit of the base currency.

If EUR/USD is quoted at 1.10, that means one euro costs 1.10 US dollars. If the price rises to 1.12, the euro has strengthened — it now costs more dollars to buy one euro. If it falls to 1.08, the euro has weakened. The same pair can be written in reverse as USD/EUR, which would show how many euros one dollar buys. Major pairs always include the US dollar: EUR/USD, GBP/USD, USD/JPY, and USD/CHF are among the most heavily traded.

Who trades in the forex market and why

Central banks trade forex to manage their currency's value and influence their economy. A central bank might sell its own currency to weaken it if exports are struggling, or buy it to strengthen it if inflation is rising. Commercial banks trade forex constantly to serve their customers and to profit from price movements. Multinational corporations trade forex because they operate in multiple countries and need to convert revenues and pay expenses in different currencies.

Investment firms and hedge funds trade forex as part of their portfolio strategy or to hedge against currency risk. Money changers and travel companies trade forex to serve customers who need physical currency. Individual traders and speculators trade forex hoping to profit from price swings, though this carries substantial risk. The sheer volume of these transactions — trillions of dollars per day — means prices move constantly and liquidity is high, so large trades can usually be executed quickly.

What moves forex prices

Interest rates are among the strongest drivers of currency value. When a central bank raises interest rates, investors want to hold that currency to earn higher returns, so demand rises and the currency strengthens. When rates fall, the currency often weakens. Economic data releases — employment figures, inflation reports, GDP growth, manufacturing output — move forex prices sharply because traders use this information to predict future interest rate decisions.

Political events and policy changes affect forex too. An election, a trade dispute, or a change in government can shift expectations about a country's economic future. Natural disasters, wars, and pandemics create uncertainty and move money toward currencies seen as safer. Market sentiment — whether traders are feeling confident or fearful — can cause entire currency groups to rise or fall together. The Swiss franc and Japanese yen, for example, often strengthen during periods of global uncertainty because traders view them as safe havens.

The difference between forex trading and currency exchange

Currency exchange for travel or business is straightforward: you give one currency and receive another at the current market rate, usually with a fee added by the money changer. You are not trying to profit from price movements. Forex trading, by contrast, is speculative — traders buy a currency pair hoping its price will rise, or sell it hoping the price will fall. They use leverage, meaning they control large amounts of currency with a small deposit, which magnifies both gains and losses.

A traveller exchanging $1,000 for euros at an airport accepts the rate offered and moves on. A forex trader might buy EUR/USD with $1,000 of their own money but control $10,000 or $50,000 worth of the pair through leverage. If the euro rises, the trader's profit is multiplied. If it falls, the loss is multiplied just as much. Forex trading is not currency exchange — it is a financial market where price movements are the product being traded.

Market structure and trading hours

Forex trades over-the-counter, meaning there is no central exchange. Instead, trades happen directly between parties through a network of banks, brokers, and electronic communication networks. This structure means there is no single "opening bell" or closing time. Trading begins each week in Asia — Tokyo, Hong Kong, Singapore — then moves to Europe — London, Frankfurt, Zurich — then to North America — New York, Toronto. As one region's business day ends, another begins.

The highest trading volume and tightest price spreads occur during the overlap between London and New York, roughly 8 a.m. to noon Eastern Time. During these hours, prices move fastest and liquidity is greatest. Trading continues around the clock except on weekends, when the market closes. Some brokers offer limited trading on Sunday evening and Friday evening, but volume is much lower.

Risks and considerations for forex participants

Leverage is the defining feature of forex trading and also its greatest risk. A trader might deposit $1,000 and control $50,000 of currency. A 2 percent move in the currency pair wipes out the entire deposit. Brokers can force positions closed if losses exceed the account balance, a process called a margin call. Overnight gaps — when the market closes in one region and opens in another with a different price — can cause losses larger than the account itself.

Forex prices move constantly and sometimes violently. Economic data releases, central bank announcements, and geopolitical events can cause sharp swings in seconds. Bid-ask spreads — the difference between the price at which you can buy and the price at which you can sell — vary depending on market conditions and the currency pair. During volatile periods, spreads widen and execution prices may differ from what was quoted. Forex trading is not suitable for people who cannot afford to lose their investment or who do not understand leverage.

Frequently Asked Questions

What is the difference between forex and the stock market?

Forex trades currencies twenty-four hours a day over-the-counter with no central exchange. Stock markets trade company shares during set hours on a physical or electronic exchange. Forex uses leverage as standard; stock trading typically does not. Forex prices are driven by interest rates and economic data; stock prices are driven by company earnings and business conditions.

Can I make money trading forex?

Some traders do profit from forex, but most individual traders lose money. Forex is highly leveraged, meaning small price movements create large gains or losses. Success requires understanding currency markets, managing risk carefully, and controlling emotions during volatile price swings. Most people who trade forex should treat it as a learning experience with money they can afford to lose.

How much money do I need to start forex trading?

Brokers vary widely. Some accept deposits as low as $100 or $500, while others require $1,000 or more. The amount you deposit is separate from the amount you can control through leverage. A $500 deposit with 50:1 leverage lets you control $25,000 of currency, but losses can exceed your deposit if the market moves against you sharply.

Why does forex trading happen twenty-four hours a day?

Forex is decentralised and trades over-the-counter, not on a single exchange with set hours. As business hours end in one time zone, they begin in another. Banks and traders in Asia, Europe, and North America all need to trade currencies simultaneously, so the market never closes except on weekends.

What are the most traded currency pairs?

The most liquid pairs are EUR/USD, GBP/USD, USD/JPY, and USD/CHF. These pairs have the tightest spreads and highest trading volume. Pairs involving the US dollar are most common because the dollar is the world's reserve currency and most international transactions involve dollars.