Majors are the pairs that put the US dollar against another large freely floating currency. Minors, also called crosses, pair two of those large currencies without the dollar. Exotics pair a major currency with a smaller or emerging-market one. The three tiers are a liquidity ranking, and liquidity is what sets your costs.
That last sentence is the reason the classification is worth knowing at all. Nobody needs the vocabulary for its own sake. What you need is the ability to look at a pair you have never traded and predict, before opening it, roughly what it will cost you to hold, how it will behave when news hits, and whether it can be traded at the hour you are awake.
The test that defines each tier
There is no official body that publishes the list, which is why you will find sources that count six majors and sources that count eight. The tests underneath are consistent even when the lists are not.
| Tier | The test | Examples |
|---|---|---|
| Major | USD on one side, a large freely floating currency on the other | EUR/USD, USD/JPY, GBP/USD, USD/CHF, AUD/USD, USD/CAD, NZD/USD |
| Minor / cross | Two major currencies, no USD | EUR/GBP, EUR/JPY, GBP/JPY, AUD/JPY, EUR/CHF, CAD/JPY |
| Exotic | One major currency against a smaller or emerging-market currency | USD/TRY, USD/ZAR, USD/MXN, EUR/TRY, USD/SGD, USD/HKD |
Some traders add a fourth informal bucket, the "commodity currencies" — AUD, NZD and CAD — because those three move with the export prices of their economies. That is a behavioural grouping rather than a liquidity one, and it cuts across the tiers above.
Why the dollar is on one side of almost everything
The tiers exist because the dollar is the market's routing currency, not because anyone designed a hierarchy. The Bank for International Settlements measured global OTC foreign exchange turnover at $9.6 trillion per day in April 2025, with the US dollar on one side of 89.2% of all trades — up from 88.4% three years earlier. The euro was on one side of 28.9% and the yen 16.8%. Critically, the BIS also records that every one of the ten most-traded currency pairs involved the dollar (BIS, OTC foreign exchange turnover in April 2025).
Those percentages add to roughly 200% rather than 100% because every trade has two currencies, so each transaction is counted on both sides. The dollar's 89.2% therefore means almost nine in ten trades in the entire market touch it.
Concentration at the top of the list is just as steep. In the London market — the largest single venue — the Bank of England's Foreign Exchange Joint Standing Committee reported that EUR/USD alone averaged $1,010 billion a day in April 2025, some 25% of all UK foreign exchange turnover (Bank of England, FXJSC semi-annual turnover survey, April 2025). One pair, a quarter of the flow.
A cross is really two trades wearing one ticket
This is the piece most explanations skip, and it changes how you read a chart.
Because dealer liquidity concentrates in the dollar legs, a non-dollar rate such as EUR/GBP has historically been derived by crossing EUR/USD against GBP/USD rather than quoted directly. Much of the liquidity behind crosses still routes that way. The practical consequences are real:
- The spread is roughly additive. You are effectively paying to cross two markets, which is why EUR/GBP is usually wider than EUR/USD even though both sides are major currencies.
- Crosses inherit two sets of news. GBP/JPY answers to the Bank of England and the Bank of Japan, and to whatever the dollar is doing to both. That is a large part of why it moves so far so fast.
- A cross can move while both legs are quiet. If EUR and GBP move the same distance against the dollar, EUR/USD and GBP/USD both trend and EUR/GBP does nothing. If they diverge slightly, the cross moves on a difference neither dollar chart shows.
That last point is the legitimate reason to trade a cross: it isolates a view about two economies against each other, with the dollar's influence largely netted out. It is also why a cross is a poor instrument for a trader whose analysis is really a dollar view. The related hazard — holding several pairs that share a currency and are therefore one position — is covered in correlation risk: why your five trades are secretly one trade.
What the tier actually costs you
Move down the tiers and four costs rise together. None of them appear as a line item on a statement.
| Cost | Majors | Crosses | Exotics |
|---|---|---|---|
| Typical spread | Tightest available | Noticeably wider | Several times wider, at every hour |
| Overnight swap | Small either way | Moderate | Can dominate the trade |
| Slippage on news | Low outside releases | Moderate | High and unpredictable |
| Tradable hours | Effectively 24/5 | Best in their own sessions | Often one session only |
Spread is the one traders check and the one they still underestimate, because it is charged on every round turn regardless of outcome — the arithmetic is in what the spread in forex actually costs. Swap is the one they forget entirely. On a high-yield exotic the overnight interest differential can be larger than the price move you were trading for, in either direction, which what swap and overnight financing are works through in detail.
Tradable hours deserve a specific warning. An exotic priced by local banks may only be liquid while those banks are open. Outside that window the spread balloons and the book thins, so a stop placed during your afternoon may be filled far from where you set it during someone else's night. The forex sessions and their overlaps map those hours.
How to choose a tier, honestly
The tier is a starting filter, not a verdict. Three questions get you to a sensible answer.
- Can you be at the screen while it is liquid? If not, the pair is unsuitable no matter how attractive the chart looks. This rules out most exotics for most people before anything else is considered.
- Is your view about the dollar, or about two other economies? A dollar view belongs in a major. A relative view between, say, the eurozone and the UK belongs in the cross.
- Is the expected move large relative to the cost of trading it? A wide-spread pair needs a bigger target to be worth the same effort. That is the same ratio that separates scalping from day trading.
For a trader still building a process, the honest answer is almost always one major, traded in one session, until the routine is boring. Which one, and why, is the subject of the best forex pairs to trade as a beginner.
Frequently Asked Questions
What are the major currency pairs?
The majors are the pairs that put the US dollar against the other most heavily traded currencies: EUR/USD, USD/JPY, GBP/USD, USD/CHF, AUD/USD, USD/CAD and NZD/USD. There is no committee that certifies the list, so you will occasionally see six names or eight. What every version agrees on is the test: one side is the dollar, and the other side is a large freely floating currency.
What is the difference between a minor pair and a cross?
In practice the terms are used interchangeably. Both describe a pair of two major currencies that does not include the US dollar, such as EUR/GBP, EUR/JPY or GBP/JPY. The word cross is the more descriptive one, because historically these rates were derived by crossing two dollar rates rather than quoted directly, and much of the liquidity behind them still routes through the dollar leg today.
Are exotic currency pairs worth trading?
They can be traded, but the costs are structurally higher and they are not a sensible place to learn. Exotics carry much wider spreads at every hour, larger overnight swap charges, thinner books that slip more on news, and exposure to political and central bank decisions that arrive without a calendar entry. Traders who use them usually have a specific reason, such as a rate differential or a macro view, rather than a chart pattern.
Why do most currency pairs include the US dollar?
Because the dollar is the market's routing currency. The Bank for International Settlements found the dollar on one side of 89.2% of all foreign exchange trades in April 2025, and every one of the ten most-traded pairs involved it. Dealers quote the dollar legs because that is where the depth sits, and non-dollar rates are assembled from those legs, which is why crosses inherit the costs of two markets instead of one.
Bottom line
Majors put the dollar against a large floating currency, crosses pair two of those currencies without it, and exotics reach into smaller or emerging-market currencies. The ranking tracks liquidity, and liquidity sets spread, swap, slippage and the hours a pair can honestly be traded. With the dollar on one side of 89.2% of global turnover and EUR/USD alone taking a quarter of London's flow, the depth is not evenly spread — so treat the tier as a cost forecast, and start where the market is deepest. The rest of the mechanics sit in the forex trading guide, and the unit you are actually trading is explained in what a pip is and how to calculate pip value.