What Is Currency Trading? A Guide to the Foreign Exchange Market

Learn what currency trading is and how the foreign exchange market works. Explore the interbank network, base and quote mechanics, and macro price drivers.

Currency trading, commonly known as foreign exchange or forex trading, is the exchange of one national currency for another at an agreed exchange rate.

Operating as a decentralised, over-the-counter (OTC) market, currency trading enables financial institutions, central banks, corporations, and retail participants to manage exchange rate risk and speculate on relative economic strength. According to the April 2025 Bank for International Settlements (BIS) Triennial Central Bank Survey, global foreign exchange turnover reached $9.6 trillion per day, up 27.8% from $7.5 trillion in 2022. It remains the largest and most liquid financial market in the world.

Key Takeaways

• Currencies trade in pairs. You buy one currency while simultaneously selling another.

• The market operates 24 hours a day, five days a week across decentralised global financial centres.

• Global daily volume reached $9.6 trillion in April 2025, most of it between banks, funds and large corporates.

• Retail traders access currencies through leveraged contracts, magnifying both profit potential and capital downside.

How Currency Quotations Work: Base and Quote Currencies

Because you cannot value a currency in isolation, all currencies trade as currency pairs. The exchange rate tells you how much of the second currency is needed to purchase one unit of the first.

• Base Currency: The first currency listed. It always represents one fixed unit.

• Quote (or Counter) Currency: The second currency listed. It indicates the amount required to buy one unit of the base currency.

For example, if EUR/USD is quoted at 1.0850, 1 Euro equals 1.0850 US Dollars. If you expect the European economy to outperform the US Dollar, you buy EUR/USD (going long the Euro, shorting the Dollar). If you expect the US Dollar to strengthen against the Euro, you sell EUR/USD.

The Structure of the Forex Market

Unlike stock trading, where shares are listed on centralised venues like the London Stock Exchange, currency trading has no central exchange floor. It operates across an electronic, tiered interbank network:

• Tier 1 — The Interbank Market: Global investment banks trade billions in currency daily across electronic broker platforms (EBS and Refinitiv Dealing).

• Tier 2 — Institutional Desks: Large hedge funds, multinational corporations, and non-bank market makers access interbank pricing via institutional prime brokers.

• Tier 3 — Retail Brokerages: Regulated brokers aggregate liquidity from higher tiers and provide pricing to retail trading terminals.

How Retail Currency Trading Operates

Retail traders rarely take physical delivery of foreign banknotes. Instead, they trade currency movements through derivatives, as detailed in our guide on What Is CFD Trading?

Retail accounts trade currencies on margin. By reviewing What Is Margin in Trading? and What Is Leverage in Trading?, you will see that a 1:200 leverage facility allows an initial margin of 0.5% to control a standard currency position. While this gives smaller balances access to global markets, currency price fluctuations act directly on the total contract value, requiring strict risk planning.

Calculating Trade Outcomes in FX: Mid-Price Symmetrical Example

Currency movements are measured in pips (price interest points), typically representing the fourth decimal place (0.0001). To calculate exact pip values, refer to our pip calculation guide and lot sizing guide.

Baseline EUR/USD Example: Consider a standard lot trade on EUR/USD under symmetrical mid-market movements (using consistent 5-decimal precision):

• Trade Size: 1.00 Standard Lot (100,000 EUR base currency)

• Entry Quote: 1.08000 (Bid) / 1.08010 (Ask) — Mid-market price: 1.08005 (0.00010 round-turn spread)

• Execution: Buy 1.00 Lot at the Ask price: 1.08010 ($108,010.00 total nominal exposure)

• Margin Held: 0.5% (1:200 leverage on major currency pairs)

• Collateral Deposited: $108,010.00 × 0.5% = $540.05

• Holding Time: 1 night (assumed financing debit of $3.50)

Scenario A: EUR/USD Declines 50 Pips from Mid-Price

1. EUR/USD drops 50 pips (0.00500) from mid-price (1.08005) to 1.07500 (Bid) / 1.07510 (Ask).

2. You close the long trade at the new Bid price: 1.07500.

3. Gross Movement: (1.07500 exit Bid – 1.08010 entry Ask) × 100,000 = -$510.00 (reflecting -$500.00 mid-market drop plus -$10.00 round-turn spread of 0.5 pip entry and 0.5 pip exit).

4. Financing Deduction: -$3.50.

5. Net Realised Loss: -$510.00 – $3.50 = -$513.50 (eroding 95.1% of allocated margin).

Scenario B: EUR/USD Advances 50 Pips from Mid-Price

1. EUR/USD advances 50 pips (0.00500) from mid-price (1.08005) to 1.08500 (Bid) / 1.08510 (Ask).

2. You close the long trade at the new Bid price: 1.08500.

3. Gross Movement: (1.08500 exit Bid – 1.08010 entry Ask) × 100,000 = +$490.00 (reflecting +$500.00 mid-market gain minus -$10.00 round-turn spread).

4. Financing Deduction: -$3.50.

5. Net Realised Profit: +$490.00 – $3.50 = +$486.50 (a 90.1% gain on margin).

The $27.00 gap between the loss (-$513.50) and gain (+$486.50) represents twice the spread ($20.00) plus twice the financing fee ($7.00), demonstrating cost asymmetry in FX trading.

Market Segments and Session Cycles

Two topics deserve their own guides and are only summarised here:

• Currency Classifications: Currency pairs fall into Major pairs (featuring the USD and representing top economic volume), Minor crosses (major currencies excluding the USD), and Exotic pairs (major currencies paired with emerging or developing economies). For specific spreads and volatility profiles, read our dedicated guide to currency pair classifications.

• Trading Sessions: FX runs around the clock from the Sydney open to the New York close. The London session accounts for the deepest turnover, with maximum volume occurring during the London-New York overlap. For full opening hours and volatility patterns, see our forex trading sessions guide.

Core Macroeconomic Drivers of Currency Prices

• Interest Rate Differentials: Capital tracks yield. When a central bank raises its benchmark policy rate, foreign investors often allocate capital to that currency's sovereign bonds, increasing demand for that currency.

• Economic Releases: Consumer Price Index (CPI), employment reports, and GDP prints alter market expectations of central bank policy. Traders monitor our real-time economic calendar to track upcoming releases.

• Market Sentiment (Risk-On vs Risk-Off): During geopolitical tension or market uncertainty, capital often moves away from risk-correlated currencies toward traditional reserve currencies such as the US Dollar, Swiss Franc, and Japanese Yen.

Accessing Currency Trading at MarketsAll

MarketsAll offers major, minor and exotic currency pairs through MetaTrader 5 and Web Trader:

• Account Entry: Standard accounts open from $50, offering flexible access for retail traders.

• No separate commission: MarketsAll charges no commission on currency trades, so the spread is the cost of entering a position. Overnight financing still applies to positions held past rollover.

• Flexible Leverage: Trade up to 1:200 leverage on eligible currency pairs with unified Negative Balance Protection.

• Unified Interface: Manage currency exposure alongside stocks, indices, and commodities within a single platform balance.

Key Risks in Currency Trading

• Leverage Risk: Leverage allows small price changes to produce substantial account drawdowns. Many traders set position sizing rules before they enter a trade.

• Slippage on Volatile Releases: Interest rate announcements and surprise policy shifts can create immediate price gaps, causing market orders to execute past stop levels.

• Rollover Financing Costs: Holding positions past the daily rollover entails financing charges that vary based on central bank interest rate gaps.

What is the minimum deposit to start currency trading at MarketsAll?

MarketsAll Standard accounts open from $50, providing direct access to currency trading on MetaTrader 5 and Web Trader.

Is forex trading the same as currency trading?

Yes. Forex, FX, and currency trading are interchangeable terms describing the exchange and speculation of national currencies against one another.

Is forex trading decentralised?

Yes. There is no central physical clearinghouse or exchange for currencies. All transactions occur electronically across an over-the-counter (OTC) network of financial institutions, market makers, and retail brokerages.

What are the most traded currency pairs?

The most liquid pairs are EUR/USD, USD/JPY, GBP/USD, and USD/CHF. Together with AUD/USD and USD/CAD, these major pairs account for the vast majority of daily global FX turnover.

How does leverage work in foreign exchange?

Leverage allows a trader to control a larger currency position with a fractional margin deposit. For instance, at 1:200 leverage, a 0.5% margin deposit controls a full position, magnifying both gains and losses.

Why does currency trading operate 24 hours a day?

Because currencies follow global working hours, moving continuously across financial hubs from Sydney and Tokyo to London and New York between Sunday evening and Friday evening.