Foreign exchange (forex) prices move constantly, but the forces behind them are not random. This guide explains what determines forex price, how to evaluate currency movements, and how to manage the risks involved.
Forex price refers to the exchange rate at which one currency can be exchanged for another. These prices are determined in the global over-the-counter (OTC) foreign exchange market, where currencies are traded 24 hours a day, five days a week. According to the Bank for International Settlements (BIS), average daily turnover in OTC foreign exchange markets reached $9.5 trillion in April 2025, a 27% increase from April 2022[reference:0][reference:1]. The BIS Triennial Central Bank Survey is the most comprehensive source of information on the size and structure of global FX markets[reference:2].
Unlike stock markets, forex has no single central exchange. Instead, it is a network of banks, brokers, hedge funds, corporations, and central banks. The price of a currency pair — such as EUR/USD or USD/JPY — reflects the relative value of the two currencies at any given moment.
At its core, a forex price is determined by supply and demand for a currency. When demand for a currency exceeds supply, its price rises; when supply exceeds demand, its price falls. But supply and demand themselves are shaped by a range of underlying factors.
In the short term, forex prices are influenced by order flow — the actual buy and sell orders placed by market participants. Large institutional orders can move prices, especially in less liquid currency pairs. Dealers (banks and prime brokers) act as intermediaries, matching buyers and sellers. The BIS notes that in April 2025, dealers relied more on intragroup trading to manage risk and matched a larger share of client trades internally than in previous years[reference:3].
Forex prices are forward-looking. They reflect market participants' expectations about future interest rates, economic growth, inflation, and political stability. If traders expect the U.S. Federal Reserve to raise interest rates, they may buy U.S. dollars in anticipation, pushing the dollar higher today.
While many factors can move forex prices, the following are the most influential:
Currencies from countries with higher interest rates tend to attract capital, boosting demand. Central bank policy decisions are closely watched.
GDP growth, employment figures, inflation (CPI), and trade balances all affect currency values. Strong data usually supports a currency.
Political uncertainty, conflicts, and elections can weaken a currency as investors seek safe havens like the USD, CHF, or gold.
Central banks may buy or sell their own currency to influence its value. The BIS has documented that reserve accumulation can help smooth exchange rate volatility[reference:5].
Risk appetite, speculative positioning, and carry trades drive short-term price swings. Sentiment can shift quickly based on news.
Exporters, importers, and international investors create persistent demand for currencies. The BIS 2025 survey showed that financial customers turned to forwards and options to hedge USD exposures[reference:6].
These drivers interact in complex ways. For example, strong economic data may lead to expectations of higher interest rates, which in turn attracts foreign investment and pushes the currency higher.
Understanding what determines forex price is valuable for a range of practical purposes:
Evaluating forex prices requires a combination of fundamental analysis and technical analysis. Here is a practical checklist for assessing currency movements:
The table below compares the main drivers of forex prices, their typical impact, and how they interact.
| Driver | Typical Impact | Time Horizon | Interaction |
|---|---|---|---|
| Interest rates | Higher rates → currency appreciates | Medium to long term | Amplified by inflation expectations |
| Economic data | Strong data → currency appreciates | Short to medium term | Influences interest rate expectations |
| Geopolitics | Uncertainty → currency depreciates (safe-haven flows) | Short to medium term | Can override economic fundamentals |
| Central bank intervention | Direct buying/selling → short-term move | Short term | Often used to counter excessive volatility |
| Market sentiment | Risk-on → higher-yielding currencies rise | Short term | Can create self-reinforcing trends |
| Trade flows | Trade surplus → currency appreciates | Long term | Gradual but persistent effect |
While large banks are major participants, the forex market is decentralized and highly competitive. No single entity can consistently control prices. The BIS Triennial Survey shows that trading is spread across thousands of participants worldwide[reference:7].
🚫 Misconception 2: “There is no risk in forex because you can always make money.”The CFTC and NASAA warn that retail forex trading carries extremely high risk, and that many retail investors lose most or all of their funds[reference:8][reference:9]. Forex is not a guaranteed way to make money.
🚫 Misconception 3: “Economic news always moves prices in a predictable direction.”Markets often react to news in unexpected ways because the news is compared to expectations. A “good” number can still cause a currency to fall if the market had priced in an even better result.
🚫 Misconception 4: “Forex prices are driven only by interest rates.”Interest rates are important, but they are only one of many drivers. Geopolitics, trade flows, and sentiment can override rate differentials for extended periods.
Retail forex trading is highly speculative and may not be suitable for all investors. The CFTC advises that you should never trade with money you cannot afford to lose, such as retirement savings or funds needed for living expenses[reference:10][reference:11]. Leverage can amplify both gains and losses, and it is possible to lose more than your initial deposit[reference:12].
Always verify the registration and regulatory status of any broker or trading platform. The CFTC maintains a public database of registered firms and disciplinary actions[reference:13]. The National Futures Association (NFA) also provides investor education and a background check system called BASIC (NFA BASIC).
This guide is for educational purposes only and does not constitute financial, legal, or tax advice. Consult a qualified professional for advice tailored to your situation.