Ever swapped money at an airport and felt slightly robbed? Congratulations, you've already traded forex. You just did it at a terrible price.
Forex (short for foreign exchange, also called FX) is the global market where currencies are exchanged. Companies pay suppliers abroad, tourists buy souvenirs, central banks manage reserves, and traders like you speculate on which currency will get stronger.
How big is "big"?
The Bank for International Settlements measured $9.6 trillion traded per day in April 2025. That's more than every stock exchange on Earth combined. Your trade is a drop in an ocean, which is good news: big orders fill fast and prices are hard to push around.
9.6 TRILLION. Per day. If you counted one dollar per second, you'd finish in about 300,000 years. Please don't try.
There's no "forex building"
Stocks trade on exchanges like the NYSE. Forex doesn't. It's over-the-counter (OTC): a worldwide web of banks, brokers and electronic platforms quoting prices to each other. As the sun moves from Sydney to Tokyo to London to New York, the market follows, which is why it's open 24 hours a day, 5 days a week.
What you actually do as a trader
You never fill a suitcase with yen. You trade the exchange rate. Think the euro will strengthen against the dollar? Buy EUR/USD. Think it will weaken? Sell it. The difference between your entry and exit price is your profit or loss.
The word "forex" became popular in the 1970s, after major currencies stopped being pegged to gold and started floating freely against each other.
- Forex is the global market for exchanging currencies, worth about $9.6 trillion a day.
- There's no central exchange; it runs 24/5 through a global network.
- Traders speculate on exchange rates rising or falling, without ever holding the cash.