Have you ever wondered why the value of the US dollar, euro, pound, or Japanese yen seems to change every day? Those movements happen inside the foreign exchange market, commonly known as the forex or FX market.
Forex is where currencies are bought, sold, exchanged, and valued against one another. It supports everything from international holidays and overseas shopping to corporate payments, global investment, and central bank operations.
Traders also participate in the market to speculate on whether one currency will strengthen or weaken. The scale of the market is enormous.
According to the Bank for International Settlements, trading in over-the-counter foreign exchange markets averaged approximately US$9.6 trillion per day in April 2025, compared with US$7.5 trillion three years earlier.
This figure includes spot transactions, forwards, swaps, options, and other currency instruments-not just trades placed by individuals.
So, how does the forex market work in practice? Let’s break down its structure, participants, prices, trading sessions, and risks in simple language.
What Is the Forex Market?
The forex market is a global marketplace where one currency is exchanged for another. An exchange rate tells you how much of one currency is needed to purchase a unit of a different currency.
For example, imagine that EUR/USD is priced at 1.1000. This means one euro can be exchanged for 1.10 US dollars. If the rate rises to 1.1050, the euro has gained value relative to the dollar.
Currency exchange happens for practical reasons every day. A European company may need US dollars to purchase American equipment, while a tourist from Indonesia may exchange rupiah for Japanese yen before visiting Tokyo.
Speculative traders participate for a different reason. They buy or sell currency pairs based on how they expect exchange rates to move. A trader may profit when the market moves in the expected direction, but a movement in the opposite direction produces a loss.
Why Forex Is a Decentralised Market
Unlike shares that are commonly traded through centralised stock exchanges, most spot forex and currency derivatives are traded over the counter, or OTC. There is no single building, exchange floor, or global computer that processes every forex transaction.
Instead, the market operates through a network of commercial banks, investment banks, electronic trading platforms, brokers, corporations, funds, and other financial institutions. Dealers connect buyers and sellers while continuously quoting prices.
This decentralised structure means prices may vary slightly between platforms. A bank might quote EUR/USD at one price, while another provider offers a marginally different rate because of liquidity, transaction size, customer relationships, and market conditions.
Modern electronic systems connect these different parts of the market extremely quickly. However, the OTC structure can also make the forex market less transparent than a centralised exchange because not every transaction is visible to every participant.
How Currency Pairs and Quotes Work
Currencies are quoted in pairs because every forex trade involves buying one currency and selling another. Common examples include EUR/USD, GBP/USD, USD/JPY, and AUD/USD.
The first currency is the base currency, while the second is the quote currency. In GBP/USD, the British pound is the base currency and the US dollar is the quote currency.
Suppose GBP/USD is trading at 1.2800. The quote means that one British pound is worth 1.28 US dollars.
If you buy GBP/USD, you are effectively buying pounds and selling dollars because you expect the pound to strengthen. If you sell the pair, you expect the pound to lose value against the dollar.
Bid, Ask, and Spread
A forex quote normally displays two prices. The bid is the price at which the provider is prepared to buy the base currency, while the ask is the price at which it is prepared to sell it.
The difference between these prices is called the spread. If EUR/USD has a bid price of 1.1000 and an ask price of 1.1002, the spread is two pips.
The spread is an important trading cost. It may become wider during quiet periods, unexpected news, or highly volatile market conditions.
Who Participates in the Forex Market?
Commercial and investment banks are among the biggest forex market participants. They process international payments, manage customer orders, hedge currency exposure, and trade with other institutions.
Central banks also influence the market. They manage national monetary policy, hold foreign currency reserves, and may occasionally buy or sell currencies. Decisions involving interest rates or money supply can significantly affect exchange rates.
International companies use forex to manage business risks. For example, an Indonesian importer that must pay a US supplier in three months faces the risk that the dollar could become more expensive. The company may use a forward contract to lock in an exchange rate.
Investment funds, pension funds, insurance companies, and asset managers exchange currencies when buying international assets. Hedge funds and proprietary trading firms may also speculate on short-term or long-term movements.
Retail traders represent another part of the market, although they account for only a portion of total global turnover. They normally access forex through brokers or dealers rather than trading directly with major international banks.
How Forex Orders Are Executed
When a retail trader places an order, the instruction is sent through a broker’s trading platform. Depending on the provider’s business model, the broker may act as the counterparty, match orders internally, or pass some exposure to external liquidity providers.
A market order requests execution at the best available price. It is usually filled quickly, although the final price may differ slightly from the price shown when the order was submitted.
A limit order is designed to enter or exit at a specified price or better. A stop order becomes active after the market reaches a particular level.
Traders may also attach a stop-loss order to close a position when the market moves against them. A take-profit order closes the trade when a selected profit target is reached.
These tools can help manage positions, but they do not guarantee perfect execution. During fast markets, low liquidity, or sudden price gaps, an order may be completed at a different price. This difference is known as slippage.
When Is the Forex Market Open?
Forex trading moves around the world as financial centres open and close. Activity generally begins in the Asia-Pacific region, continues through Europe, and then moves into North America.
This creates an almost continuous market from Monday morning in the Asia-Pacific region until Friday evening in North America. Retail platforms therefore commonly describe forex as being available 24 hours a day, five days a week.
However, activity is not equally strong throughout the entire day. Liquidity usually increases when major financial sessions overlap.
The London and New York overlap is often particularly active because both European and American institutions are trading. Greater participation can create tighter spreads, but it may also produce faster price movements.
The market normally closes during weekends, although economic or political events can still happen. As a result, prices may reopen on Monday at a noticeably different level from Friday’s closing price.
What Causes Exchange Rates to Move?
Currency prices are shaped by supply and demand. If demand for a currency increases relative to its supply, its value may rise. If more participants want to sell it, its value may fall.
Interest rates are one major influence. Higher interest rates can make a currency more attractive because investors may earn a better return from assets denominated in that currency.
However, markets also consider inflation, economic growth, financial stability, and future policy expectations.
Economic reports can create rapid movements. Traders watch employment data, inflation figures, retail sales, manufacturing activity, trade balances, and gross domestic product.
Central bank announcements are especially important. A surprise interest-rate decision or an unexpected change in policy guidance can move a currency within seconds.
Political instability, elections, wars, trade disputes, natural disasters, and changes in investor confidence may also affect exchange rates.
During periods of uncertainty, traders sometimes move toward currencies they consider relatively safer, although no currency is completely protected from losses.
How Spot Trades, Forwards, and Swaps Differ
The forex market includes several types of transactions. The spot market involves exchanging currencies at the current market rate, with settlement usually occurring shortly afterward.
A forward contract sets an exchange rate today for a transaction that will happen on a future date. Businesses commonly use forwards to reduce uncertainty around international payments.
An FX swap combines two related currency transactions. Participants exchange currencies and agree to reverse the exchange later, usually at a predetermined rate.
FX swaps represented approximately 42% of total global foreign exchange turnover in the BIS April 2025 survey.
Spot trading accounted for about 31%, while outright forwards represented around 19%. These figures show that much of the forex market exists to manage funding and currency risk rather than simply to speculate on daily price charts.
How Leverage and Margin Affect Retail Trading
Retail forex platforms commonly offer leverage, allowing traders to control positions that are larger than their account balances. Margin is the amount of money that must be set aside to maintain a leveraged position.
Suppose a trader deposits US$1,000 and uses 20:1 leverage. The trader may be able to control a position worth US$20,000.
A 1% favourable movement in that position would equal US$200 before costs. However, a 1% unfavourable movement would also produce a US$200 loss, equal to 20% of the original account.
Leverage therefore magnifies both gains and losses. Investor.gov warns that leveraged currency trading may cause traders to lose all their initial capital and, under some arrangements, more than the original amount deposited.
Regulators in some jurisdictions restrict retail leverage. The UK Financial Conduct Authority, for example, limits leverage on retail CFDs to between 30:1 and 2:1, depending on the underlying asset, and requires negative balance protection. Regulations vary by country and product.
What Beginners Should Understand Before Trading
Understanding how the forex market works does not remove its risks. Prices can change quickly, and transaction costs, leverage, financing charges, poor execution, and emotional decisions can reduce returns.
The US Commodity Futures Trading Commission has reported that roughly two out of three customers at registered OTC forex dealers lost money when fees, financing charges, and other costs were included.
Beginners should first learn with educational materials and a demo account. They should understand order types, spreads, position sizing, margin requirements, and the possibility of rapid losses before depositing real money.
Checking a broker’s regulatory status is also essential. Traders in Indonesia can search Bappebti’s official legal-status portal to see whether a futures broker is registered. A professional-looking website or social media account is not proof that a business is authorised.
The forex market works through a decentralised global network in which banks, companies, funds, governments, brokers, and individuals exchange currencies.
Prices are quoted in pairs and move according to supply, demand, interest rates, economic information, central bank decisions, and global events.
Retail traders access the market through brokers and may use tools such as market orders, limit orders, stop-losses, and leverage. However, high accessibility does not mean forex is easy or consistently profitable.
Before opening a live account, study how currency quotes, spreads, orders, margin, and trading costs work. Practise carefully, verify the broker’s licence, and use only money you can afford to lose. Your first goal should be understanding the market-not chasing fast returns.