Currency pair
Currency pair and forex are often used as if they meant the same thing. Forex is the market: the global exchange of one currency for another. A currency pair is the instrument traded in that market, the specific two-currency quote such as EUR/USD that a position is opened on. This page covers the instrument; the market is covered under forex.
A currency pair is the instrument traded in forex: two currencies quoted against each other as one price, showing how many units of the second currency one unit of the first buys.
The first currency is the base, the second is the quote. Buying the pair buys the base and sells the quote at the same time, and the price is the exchange rate between them. Pairs are grouped as majors, minors, and exotics by the currencies they contain and the liquidity behind them.
This page covers the mechanic; it is not trading advice.
Reading a pair as one instrument
A currency pair packages two currencies into one tradable price. EUR/USD at 1.0850 is a single instrument that says one euro buys 1.0850 US dollars. There is no way to trade the euro alone on the Forex market: a position is always the base currency against a counter currency, which is why the instrument is a pair and not a single asset.
Going long the pair means buying the base and selling the quote in one action; going short is the reverse. A long EUR/USD position profits when the euro strengthens against the dollar and loses when it weakens. The price is two-sided, a Spread between the bid and the ask, so the pair is bought at the ask and sold at the bid.
Pairs fall into three tiers. Majors pair the US dollar with another heavily traded currency: EUR/USD, GBP/USD, USD/JPY, USD/CHF, AUD/USD, USD/CAD, NZD/USD. Minors, or crosses, combine two non-dollar majors, such as EUR/GBP or GBP/JPY. Exotics pair a major with an emerging-market currency, such as USD/MXN or USD/ZAR. Spread typically widens from majors through minors to exotics as the liquidity behind each tier thins.
What a pair's price movement is worth
A move in the pair's price is a move in the exchange rate between its two currencies, and its cash value depends on which currency sits where.
On EUR/USD, one standard lot is 100,000 euros, the base currency. At 1.0850 the position is worth 100,000 × 1.0850 = $108,500 in the quote currency. A one-Pip move, the fourth decimal, is 0.0001 × 100,000 = $10 on a USD account, because the US dollar is the quote currency and needs no conversion.
Where the dollar is the base rather than the quote, the pip value floats with the price. On USD/JPY at 149.50, one standard lot is 100,000 US dollars, and a one-pip move (the second decimal on a yen pair) is 0.01 × 100,000 = ¥1,000, which converts to 1,000 ÷ 149.50 = $6.69 on a USD account. The same one-pip move is worth $10 on EUR/USD and $6.69 on USD/JPY because the pair fixes which currency the pip is denominated in before conversion.
Why the order of the two currencies matters
The pair is directional by construction. EUR/USD and a hypothetical USD/EUR are the same two currencies in opposite order, and they move inversely: if the euro strengthens, EUR/USD rises while the inverse falls. Selling EUR/USD is mechanically the same as buying dollars with euros. The convention fixes which currency is the base so that every trader quotes the same pair the same way; EUR/USD is never written USD/EUR in the retail market.
The spread on a pair is set by the broker, not by the pair itself. A major such as EUR/USD commonly runs from a floor of roughly 0.1 to 1.5 pips depending on account type, while an exotic can run tens of pips; the figures are published in the broker's contract specifications and vary by account and market conditions, not a single universal number.
The three tiers track where the market's volume sits. EUR/USD is the single most-traded instrument in the currency market, and the seven majors together carry the majority of daily turnover, which is why their spreads are tightest and their price action is the most continuous. An exotic trades a small fraction of that volume, so its wider spread and sharper jumps are the direct cost of thinner participation rather than a quirk of the currency itself.
Each pair contains two currencies playing fixed roles, and which is which decides direction and pip denomination:
Base and quote currencyWhich currency is which in a pair, and what a price move means for each side.Related terms
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Common questions
What is the difference between a currency pair and forex?
Forex is the market; a currency pair is the instrument traded in it. The word forex, short for foreign exchange, refers to the global buying and selling of one currency for another. A currency pair, such as EUR/USD or GBP/JPY, is the specific two-currency quote a position is opened on within that market. Taking a position on a currency pair is how a trader participates in forex; the two terms are related but not interchangeable.
What are major, minor, and exotic currency pairs?
Majors pair the US dollar with another heavily traded currency: EUR/USD, GBP/USD, USD/JPY, USD/CHF, USD/CAD, AUD/USD, NZD/USD. Minors, also called crosses, combine two non-dollar majors, such as EUR/GBP, EUR/JPY, and GBP/JPY. Exotics pair a major currency with an emerging-market currency, such as USD/MXN, USD/ZAR, and USD/TRY. Spread and volatility generally rise from majors through minors to exotics as the liquidity behind each tier decreases.
What does it mean to buy or sell a currency pair?
Buying a pair means buying the base currency and selling the quote currency at the same time; selling the pair is the reverse. A long EUR/USD position is long the euro and short the US dollar, and it profits when the euro strengthens relative to the dollar. Because every pair is two currencies at once, there is no separate action to sell the quote: it happens automatically when the base is bought.
How is a currency pair priced?
The price of a pair is the exchange rate of its base currency in units of its quote currency. EUR/USD at 1.0850 means one euro is worth 1.0850 US dollars. The quote is two-sided: a lower bid and a higher ask, with the gap between them the spread. A position is opened at the ask when buying and at the bid when selling, so the spread is paid once on the round trip.