The largest market in the world, and why it exists at all.
beginner · 5 min read · 10 XP
By the end of this lesson you will be able to explain what the foreign exchange market is, why it exists, and how it differs from the stock market you have probably heard more about.
Every other market you know trades things priced in money: shares, oil, coffee, houses. The foreign exchange market trades the money.
That sounds abstract until you have ever changed currency at an airport. You handed over pounds and received euros at some rate, and that rate was a price — the price of one currency expressed in another. The forex market is that transaction, running continuously, at a scale that is difficult to picture: around seven and a half trillion US dollars changes hands every day, according to the Bank for International Settlements' triennial survey. The entire New York Stock Exchange trades a fraction of that in a month.
Why the size matters to you
A market this deep is very hard for any single participant to push around. That is good news — it means the price you see is a real consensus rather than one large player's opinion — and bad news, because it also means no amount of conviction on your part will move it.
Forex is not primarily a speculative market. It exists because the world does business across borders and those borders use different money.
All of that is real economic activity with a currency conversion attached, and it happens whether or not anyone is speculating. Speculators — funds, banks' trading desks, and retail traders like you — sit on top of that flow, and the liquidity they add is what makes it possible to trade EUR/USD at almost any hour with a spread of a fraction of a pip.
Here is the idea that trips up almost everyone at the start: you never buy a currency on its own. There is no price for "a euro" in isolation, only a price for a euro in terms of something else.
So every forex trade is simultaneously a purchase and a sale. Buying EUR/USD means buying euros and selling dollars in one action. If the price rises, that can mean the euro strengthened, or the dollar weakened, or both moved and the euro moved more. Reading a chart as "EUR/USD is going up" is fine as shorthand, but the two-sided reality is what makes currency analysis different from analysing a share.
Not necessarily. It might have — but the dollar may simply have strengthened more than the euro did. This is exactly why traders look at a currency's performance against a basket of others rather than a single pair. A currency strength meter does that arithmetic for you.
Four differences matter in practice.
There is no exchange. Forex is an over-the-counter market: a decentralised network of banks, brokers and electronic platforms dealing directly with each other. There is no single building where the price is set, which is why two brokers can quote very slightly different prices at the same instant.
It runs almost continuously. Because the participants are spread across the globe, the market opens in Sydney on Sunday evening (UTC) and closes in New York on Friday — around 24 hours a day, five days a week. You cannot "miss the open" the way you can with equities, but you can absolutely trade at a time of day when nothing is moving.
There are no shares to run out of. You can sell a currency pair you do not own as easily as you can buy it, because you are always selling one currency and buying another. Shorting carries none of the borrow mechanics of the stock market.
Leverage is standard. Brokers routinely offer leverage that would be exotic in equities. This is the single largest reason new forex traders lose money quickly, and it gets a lesson of its own.
It helps to be realistic about the company you are keeping. In rough order of size: the major dealing banks, central banks, hedge funds and asset managers, corporations hedging real business flows, and — a small sliver at the end — retail traders.
You are not going to out-resource any of them. What you have instead is the freedom to do nothing. A bank's FX desk must quote a price all day; a fund has a mandate to be invested. You can wait for a setup you understand and sit on your hands the rest of the week, and that flexibility is a genuine edge if you use it.
What to remember
The forex market is the exchange of one currency for another, running over the counter across the globe at roughly $7.5 trillion a day. It exists to serve real cross-border commerce, and every trade you place is simultaneously a purchase of one currency and a sale of another.