Currency pair

What is a Currency Pair in Forex and CFD Trading

A currency pair is the quotation of two currencies where the value of one is expressed in terms of the other. The first listed currency is the base currency, the second is the quote currency. It is the fundamental instrument of the forex market, defining the exchange rate and determining profit or loss based on relative price movement. Live pricing is visible as a two-way bid/ask quote in the Market Watch window of platforms like MT4/MT5, as detailed in our glossary.

Key Facts

• Structure: Always written as Base Currency / Quote Currency — e.g., EUR/USD.
• Pricing: The quote price indicates how much of the quote currency is needed to buy one unit of the base currency.
• Categories: Majors (include USD, e.g., EUR/USD) · Minors/Crosses (exclude USD, e.g., EUR/GBP) · Exotics (one major + one less-traded currency).
• Most Traded: EUR/USD is the most liquid pair globally, accounting for the largest share of daily forex volume.
• Value Fluctuation: Movements are measured in pips — typically the fourth decimal place for most pairs.
• Pip Value Formula: Pip Value (in quote currency) = (One Pip in Decimal) × Lot Size

How It Works

• Quotation: The broker quotes EUR/USD at 1.1000 — meaning 1 Euro costs 1.1000 US Dollars.
• Long Position: Buying EUR/USD = buying the base (EUR) and selling the quote (USD). Executed at the Ask price.
• Short Position: Selling EUR/USD = selling the base (EUR) and buying the quote (USD). Executed at the Bid price.
• Exchange Rate Impact: If EUR strengthens vs USD, the pair price rises — benefiting a long position.
• Cost: The spread (Ask − Bid) is the transaction cost paid to the broker or liquidity provider.

Example: Real Trade PnL Calculation

Position: Buy 1 standard lot EUR/USD (100,000 units)

How Currency Pair Choice Affects Cost and Risk

Currency Pair vs Related Concepts

vs Base Currency: The currency pair is the complete tradable instrument. The base currency is only the first listed component — it defines the standard unit size (typically 100,000 units per standard lot).

vs Spot Rate: The spot rate is the current dynamic market price of the pair at any given moment. The currency pair (e.g., EUR/USD) is the fixed instrument structure itself.

Broker Differences Across the Industry

How to Verify on MT5

1. Open the Market Watch window — lists all available instruments.
2. Right-click the desired pair (e.g., EUR/USD) → select Specification.
3. Confirm Contract Size (typically 100,000 for a standard lot) and required Margin.
4. Right-click Market Watch to add the Spread column — observe real-time spread in pips.
5. Open a New Order window and check Swap Long / Swap Short values for overnight financing costs.
6. Use the crosshair tool on the chart to verify Bid/Ask prices match Market Watch data.
7. Sanity check: For liquid Majors, the quote should show four decimal places for the price and a fifth decimal place for the fractional pip.