Lessons
Who Really Runs The Currency Market? Why The Dollar Wins
Who Really Runs The Currency Market
Dave placed one EUR/USD order on a Tuesday morning and got a completely different price than the guy sitting next to him — same second, same pair, same broker open on both screens. He thought he'd been scammed. He hadn't. He just didn't know this market has no address, no opening bell, and no single price for everybody, and that gap in his knowledge cost him real pips before he understood what happened.Today we're getting inside that gap: why there's no building called the forex exchange, why the dollar shows up in almost every trade you'll ever place, and why the exact same setup behaves differently depending on the clock on the wall.
No Building, No Bell
Here's what Dave was missing. Stocks trade on an exchange — one floor, one order book, everybody sees the same price at the same moment. Forex has none of that. It's an over-the-counter (OTC) market, meaning trading happens directly between two parties, electronically, through a rolling web of banks and financial institutions strung across London, New York, Tokyo, and Singapore.No single building, no closing bell. Somewhere on that chain a desk is open right now, twenty-four hours a day. So if there's no central price feed, who decided what price Dave got? That's the real question, and it's the whole reason this market behaves the way it does.
Pick Your Counterparty
In an OTC market, nobody is forced to trade with anybody. Every bank and broker in that network quotes its own price, based on its own risk, its own client flow, and its own reputation for actually honoring a quote. A trader — or a bank trading on his behalf — can shop around, comparing who's offering the tightest price right now, who's reliable, and who won't slip a few extra pips for fun.Dave's broker simply routed him to a different counterparty than his friend, at a moment when quotes weren't identical across the network. That's normal here. But it raises the real question: out of every currency changing hands in that web, which ones actually show up the most?
The Top Seven Currencies
Pause for a second before the reveal — guess which seven currencies show up most in trading on earth. Here's the real ranking, from the global survey banks report to every three years: the US dollar first, by a landslide. The euro second. The Japanese yen third. Then the British pound, the Chinese yuan, the Australian dollar, and the Canadian dollar rounding out the top seven, according to the Bank for International Settlements' Triennial Survey.Notice the gap between the dollar and everyone else isn't small — it's not first place by a nose, it's first place by an entire body length. Which begs the obvious question: why does one single currency dominate a market that spans the whole planet?
One Side Of Almost Everything
Here's the number that sounds like a typo until you understand it. The dollar sits on one side of roughly 89% of all currency transactions on earth — the BIS clocked it at 88.5% in April 2022 and it climbed to 89.2% by April 2025. Not 89% of dollar trades — 89% of everything.Euro to yen, pound to franc, doesn't matter — dollars are usually involved somewhere in the chain even when neither trader wants dollars at all. EUR/USD alone remains the single most traded pair on the planet, at roughly a fifth of all daily volume. Dave assumed euro-dollar was just two currencies meeting. It's actually the world's default meeting point.
What Central Banks Hold
So what makes one currency the meeting point for the entire planet's money? That's structural, and it starts with something central banks hold in vaults. Every country's central bank keeps a stash of foreign currency on hand, called foreign exchange reserves — the emergency fund a government uses to pay foreign debts, defend its own currency, or settle trade when needed.Look at what's actually sitting in those vaults worldwide: as of early 2026, over 57% of all reserves held by central banks globally are held in dollars, according to the IMF's COFER data. Not the local currency of a rich neighbor, not gold — dollars. That fact tells you the dollar isn't just popular with traders; it's trusted by governments as the safest place to park national savings.
Why The Dollar Sits At The Center
But trust doesn't happen by accident. Something specific earned the dollar that seat, and it's not one reason — it's a stack of them. Guess how many separate reasons stack up behind the dollar's position, before the list: most people guess two or three. There are at least seven.The US runs the largest economy on the planet.Its bonds and markets are deep enough to absorb massive trades without breaking.It's stable enough — politically and militarily — that governments trust it for the long haul.Most cross-border loans and bonds are written in dollars, so companies need dollars just to pay their own debt.It's the default medium for trade between two countries that don't even use the dollar at home.Stack all of them together and you get a currency that's less a national currency and more the operating system world trade runs on.
Priced In Dollars
Oil is priced and settled in dollars almost everywhere on earth, no matter which two countries are doing the deal. That arrangement, often called the petrodollar system, means a country buying oil anywhere has to acquire dollars first — even if neither side wants anything else to do with the American economy.Same story with plenty of other major commodities: gold, wheat, industrial metals. Every one of those purchases quietly generates dollar demand in the background, all day, every day, completely separate from anyone speculating on a chart. Which raises an interesting split: if trade and reserves and oil all need dollars for real business, how much of the daily volume Dave sees is actually pure speculation versus quiet, boring, unavoidable demand?
Remember
Context beats the pattern, the stop is what saves you, and nothing replaces practice on a live chart. The dollar's dominance isn't a conspiracy or a coincidence — it's the accumulated weight of reserves, trade invoicing, commodity pricing, and market depth, all reinforcing each other every single day. Understanding why the price you see isn't the only price out there is the difference between trading with your eyes open and getting caught off guard like Dave.
Key takeaways
- Forex has no central exchange — it's an OTC network of banks quoting their own prices, which is why two traders can see two different prices at the same moment.
- The US dollar is on one side of roughly 89% of all global currency trades, and EUR/USD is the single most traded pair on earth.
- Over 57% of global central bank reserves are held in dollars, far more than any other currency, cementing the dollar as the world's default safe-haven asset.
- The dollar's dominance rests on at least seven structural pillars: economic size, market depth, political stability, debt denomination, trade invoicing, and commodity pricing.
- Oil and most major commodities are priced in dollars worldwide (the 'petrodollar' system), generating constant background demand for USD regardless of speculation.
Frequently asked questions
Why did I get a different price than my friend on the same currency pair?
Forex is an over-the-counter market with no single central price feed. Different brokers connect to different liquidity providers, so quotes can vary slightly between traders at the exact same moment.
Why is the US dollar involved in almost every forex trade?
The dollar is on one side of about 89% of all currency transactions because it's the world's primary reserve currency, the main currency for trade invoicing and commodity pricing, and the deepest, most liquid market for parking capital.
What percentage of global reserves are held in US dollars?
As of early 2026, roughly 57% of all official foreign exchange reserves held by central banks worldwide are denominated in US dollars, according to IMF COFER data.
What is the petrodollar system?
It's the arrangement where oil (and most major commodities) is priced and settled in US dollars globally, meaning any country buying oil must first acquire dollars, creating constant baseline demand for the currency.
Which currencies are traded the most after the dollar?
According to the BIS Triennial Survey, the ranking after the US dollar is the euro, Japanese yen, British pound, Chinese yuan, Australian dollar, and Canadian dollar.