Currency Pair

A currency pair is the fundamental unit of foreign-exchange trading: two currencies quoted together as a single price. EUR/USD = 1.0850 means one euro is worth 1.0850 US dollars. Every FX transaction — whether a spot trade, forward, option, or future — specifies a currency pair.

Base and quote: the order matters

A currency pair always names two currencies in a fixed order. The first is the base; the second is the quote. EUR/USD means you are pricing euros in terms of dollars. GBP/JPY means pounds in terms of yen. The order is not arbitrary. Switching the order inverts the price: if EUR/USD is 1.0850, then USD/EUR is 1/1.0850 = 0.9217. Both quotes are correct; they express the same market from opposite angles.

When you buy a currency pair, you are buying the base and selling the quote. “Buy EUR/USD” means you are buying euros and paying dollars. “Sell EUR/USD” means you are selling euros and receiving dollars. This convention is universal across spot, forwards, options, and futures.

Major, minor, and exotic pairs

The FX market is organized by liquidity and prominence. Major pairs involve the US dollar and another large-economy currency — EUR/USD, USD/JPY, GBP/USD. They trade round the clock on dozens of platforms and have the tightest spreads.

Minor pairs — also called cross-rates — involve two major currencies but neither is the dollar. EUR/GBP, AUD/JPY, and so on. They are liquid but less so than majors.

Exotic pairs involve a major currency and a smaller-economy currency — USD/BRL (Brazil), AUD/SGD (Singapore), EUR/TRY (Turkey). Exotic pairs are illiquid; spreads are wide; quotes update slowly.

How pairs are quoted and settled

A pair trades at a bid and ask. The bid is the price at which the dealer will buy the base (and you will sell). The ask is the price at which the dealer will sell the base (and you will buy). The difference is the spread. Tighter spreads (smaller gaps) mean lower transaction costs; wider spreads mean higher costs. Spreads are measured in pips — the smallest unit of movement in an FX quote.

The spot pair settles in two business days. Forward pairs settle at a future date. Options and futures derive from pairs but involve contracts rather than direct exchange.

Conventions and quirks

Some pairs are conventionally quoted one direction; the same pair may reverse in different markets or regions. EUR/USD is always euro as base, dollar as quote, everywhere. But some exotic pairs have loose conventions; check the market’s standard before trading.

A cross rate is any pair not involving the US dollar. To price EUR/GBP, a dealer might construct it from EUR/USD and USD/GBP — buying euros for dollars and selling dollars for pounds — and quote the synthetic price. Most cross-rates are priced this way.

Pairs and leverage

In the retail forex market, currency pairs are often traded on high leverage — 50:1, 100:1, or even higher. You do not own the currency; you control a much larger notional position with a small margin deposit. A small move in the pair, multiplied by leverage, can erase your entire deposit or even generate losses beyond it. This is why the pip — a tiny unit of movement — matters so much: on a leveraged position, a few pips equal months of your capital.

See also