Forex trading means exchanging one currency for another, or taking a position whose value changes with an exchange rate. In EUR/USD, the euro is the base currency and the US dollar is the quote currency. A rate of 1.1000 means one euro is quoted at 1.10 US dollars.
Understanding the quotation is only the first step. The product, transaction costs, leverage and counterparty determine what you actually own and how much you could lose.
How big is the forex market?
The BIS December 2025 analysis of its Triennial Survey reports average over-the-counter FX turnover of approximately $9.5 trillion a day in April 2025. This covers global spot and derivatives activity, not just retail speculation. It is a dated survey observation, not a forecast for 2026. Source: BIS, Global FX markets when hedging takes centre stage.
What are you actually trading?
Converting money for travel, trading an OTC margin account and buying a currency futures contract are different transactions. Much of the global market operates through dealer networks rather than one central exchange. Exchange-traded currency derivatives also exist.
For US retail OTC forex, the CFTC explains that the dealer is your counterparty and controls the platform. Do not assume a familiar trading app means you are trading on a regulated exchange. Source: CFTC customer advisory.
Five terms to understand first
- Currency pair
- The base currency is priced in the quote currency. Buying EUR/USD creates exposure to a rising euro relative to the dollar; the opposite move produces a loss.
- Pip
- A conventional unit of exchange-rate change, commonly 0.0001 for many pairs and 0.01 for yen-quoted pairs. Platforms may display smaller fractional-pip increments, so a pip is not always the smallest displayed tick.
- Spread
- The difference between the bid and ask. A quoted mid-price is not necessarily a price at which you can transact.
- Position size
- The amount of currency exposure. A standard FX lot commonly represents 100,000 base-currency units, but always check the product’s contract specification.
- Margin and leverage
- Margin is collateral; leverage describes exposure relative to the capital supporting it. Neither is a limit on possible losses.
Worked example: EUR/USD profit and loss
Hypothetical example, not current market prices. Suppose a position represents buying 10,000 euros at 1.1000 USD per euro.
- Exit at 1.1050: (1.1050 − 1.1000) × 10,000 = $50 gross gain.
- Exit at 1.0950: (1.0950 − 1.1000) × 10,000 = $50 gross loss.
- In this example, one 0.0001 pip is worth $1. That value is not universal across pairs and position sizes.
These calculations exclude spreads, commission, financing, currency conversion and slippage. The same price change can create a much larger percentage loss on a small margin deposit than on fully funded exposure.
Before opening an account
- Identify the legal entity and regulator. Check the regulator’s own register, including the website and permissions; do not rely on a logo in an advertisement.
- Read the actual contract. Confirm the product, margin rules, liquidation process, withdrawal terms and whether losses can exceed deposits. Protections differ by jurisdiction and account.
- List all costs. Include overnight financing and conversion charges, not just advertised commission.
- Practise the mechanics. A demo account can teach order entry but does not prove profitable execution with real money.
The CFTC warns about leverage, withdrawal problems and unregistered offshore dealers. Registration is not a profit guarantee. Read the CFTC’s forex-fraud checks.
Use market tools as context, not trading signals
Our forex heatmap helps compare currency movements. Check the provider’s timestamp and delay information before interpreting any quote. Read the market versus limit order guide to understand the trade-off between execution and price control.
Common questions
Is forex open all the time?
Major FX dealing generally spans the business week across time zones. Broker sessions, holidays and maintenance differ; weekend reopening can involve price gaps. “24/5” does not guarantee continuous liquidity.
Can a stop-loss guarantee the maximum loss?
Not an ordinary stop order. Execution may differ from the trigger price during gaps or fast markets. Product-specific guarantees, where offered, have their own conditions.
Does a small minimum deposit make forex low risk?
No. A minimum deposit says little about position exposure, fees or the ability to absorb losses. This guide does not prescribe a deposit or recommend a broker.
Editorial correction: the earlier version labelled an older market-volume figure as 2026 activity. This revision dates the BIS observation, removes generic leverage comparisons and clarifies loss and execution risks. Corrections policy.