What is forex trading?

The foreign exchange market — usually shortened to forex or FX — is where the world's currencies are bought and sold. With more than $7 trillion changing hands every single day, it is by a wide margin the largest and most liquid financial market on the planet, dwarfing every stock exchange combined. That scale matters to you as a trader: deep liquidity means you can almost always enter and exit a position quickly, and that competition between participants keeps trading costs low.

Unlike a stock exchange, forex has no single physical location. It is an over-the-counter (OTC) market, meaning trades happen electronically through a global network of banks, brokers, funds and individual traders. Because that network spans every time zone, the market runs 24 hours a day, five days a week — opening in Sydney on Monday morning and closing in New York on Friday evening.

You never buy a currency in isolation; you always exchange one for another. That is why every forex quote is a pair, such as EUR/USD or GBP/JPY. When you buy EUR/USD, you are simultaneously buying euros and selling US dollars — taking the view that the euro will strengthen relative to the dollar. If you are wrong and the euro weakens, the position moves against you.

The first currency in the pair is the base currency and the second is the quote currency. The price tells you how much of the quote currency it takes to buy one unit of the base currency. If EUR/USD is quoted at 1.0850, one euro costs 1.0850 US dollars. Major pairs always include the US dollar; crosses (like EUR/GBP) do not; and exotics pair a major with a smaller economy's currency.

At its core, an exchange rate is just a price, and like any price it is set by the balance of supply and demand. When more capital wants to flow into a currency than out of it, the currency appreciates; when the flow reverses, it depreciates. A trader's job is to anticipate where that balance is heading before the rest of the market does.

The forces behind those flows are macroeconomic. Interest rates are the single biggest driver — higher rates tend to attract foreign capital chasing yield, lifting the currency. Inflation, economic growth, employment data, central-bank policy and geopolitical events all feed into expectations and shift the balance. You don't need to forecast every release perfectly; you need to understand the direction these forces are pushing.

Imagine you buy one mini lot (10,000 units) of EUR/USD at 1.0850 because you expect the euro to rise. The price climbs to 1.0900 — a move of 50 pips — and you close the trade. On a 10,000-unit position each pip is worth roughly $1, so your 50-pip gain is about $50 before costs.

Now suppose the euro fell to 1.0800 instead. The same 50-pip move against you would cost about $50. This symmetry is the essence of trading: every position carries the potential for both profit and loss, which is why understanding risk from day one matters as much as understanding opportunity.