What Is the Forex Market and Who Actually Trades It?

Before any term or tool makes sense, it helps to know who is actually on the other side of a currency trade.

What is the forex market and who actually trades it? The foreign exchange market, usually shortened to forex or FX, is the global marketplace where one currency is exchanged for another. It is the largest financial market in the world by trading volume, operating nearly 24 hours a day across time zones as major financial centers open and close in sequence — Tokyo, London, New York. But the size of the market and the identity of its most active participants are two very different things, and understanding that gap is the single most useful thing to know before reading anything else about forex.

The overwhelming majority of currency trading volume comes from a small set of large, well-capitalized players: central banks managing monetary policy and currency reserves, commercial and investment banks trading on their own account and for clients, multinational corporations converting revenue earned in one currency into another to repatriate profits or pay suppliers, and large institutional investors — pension funds, hedge funds, sovereign wealth funds — adjusting currency exposure as part of broader investment strategy. This is often called the interbank market, because for decades the largest trades happened directly between banks, negotiated privately rather than on a public exchange.

Where retail traders fit into this picture

Retail forex trading — an individual opening an account with their own money through an online trading platform — is a comparatively recent development, made possible by internet-based trading platforms starting in the late 1990s and 2000s. It remains a small fraction of total forex market volume. That matters because it means a retail trader is, structurally, trading in a market whose price action is overwhelmingly driven by participants with better information, faster execution, larger capital reserves, and often a fundamentally different purpose for being in the market at all — a multinational converting quarterly earnings is not trying to predict tomorrow's price movement the way a retail speculator is.

This isn't meant to discourage curiosity about how the market works — understanding the mechanics is genuinely useful, whether you're curious about macroeconomics, need to understand a term a colleague used, or are trying to figure out whether an opportunity someone pitched you makes sense. It's meant to set accurate expectations about what kind of market this actually is before any discussion of price movements, terminology, or tools.

Why currencies move at all

Currency values shift constantly because they reflect the relative economic conditions, interest rate expectations, and political stability of the countries whose currencies are being compared. A central bank raising interest rates tends to make that currency more attractive to hold, since money parked in that currency earns more. Trade balances, inflation data, employment reports and geopolitical events all feed into this pricing, which is why professional participants in this market employ economists, analysts and enormous data infrastructure to try to anticipate these movements — and even they are frequently wrong.

This is worth sitting with. If institutions with vastly more resources, information, and speed cannot reliably predict short-term currency movements, that's a meaningful data point for anyone considering whether to speculate on those same movements with their own money.

Currency pairs, the basic building block

Currencies are always quoted in pairs, because a currency's value only means something relative to another currency. EUR/USD, for example, shows how many US dollars one euro is worth. The first currency listed is the base currency; the second is the quote currency. When people talk about a currency pair's price moving, they mean the value of the base currency relative to the quote currency is changing — this is the foundation for understanding pips and spreads, covered in the pips and spreads guide.

How the market actually operates, hour by hour

Unlike a stock exchange with a fixed opening bell and closing bell, the forex market operates as a decentralized network of banks, brokers and electronic trading venues spread across the globe. As one major financial center closes for the day, another is opening, which is why the market is often described as trading nearly 24 hours a day, five days a week. Trading activity is not evenly distributed across that window, though — volume and liquidity tend to concentrate during the hours when two major financial centers overlap, since that is when the largest number of active institutional participants are simultaneously online. Understanding that liquidity ebbs and flows through the day matters for the same reason spreads widen during quiet periods, covered in the pips and spreads guide: a market with fewer active participants at a given moment is a market where prices can move further on smaller amounts of trading activity.

A brief note on how currency regimes have changed

It helps to know, at a basic level, that the way currency values are determined has changed significantly over time. For much of the twentieth century, many major currencies were pegged to fixed exchange rates, tied indirectly to gold, under an international agreement that limited how much currency values could move. That system was phased out in the early 1970s, after which most major currencies moved to a floating exchange rate, where value is set continuously by market supply and demand rather than a fixed peg. Some countries still peg their currency to another, usually the US dollar, for economic stability, while others allow a managed float where a central bank intervenes periodically without a strict fixed rate. This history matters because it explains why continuous currency trading — and therefore retail forex trading — is structurally possible at all today.

What moves a currency's value in practice

Beyond interest rates and inflation, currency values respond to trade balances (whether a country exports more than it imports), political stability, capital flows into or out of a country's financial markets, and expectations about future central bank policy — markets often move more on what participants expect a central bank to do next than on what it has already done. This layering of expectations on top of current data is part of why currency movements are difficult to predict even for well-resourced institutional desks: a piece of economic data can be released exactly as forecast and the currency can still move sharply, because the market had already priced in a different expectation beforehand.

What this means before you go further

None of this is a reason to avoid learning about currency markets — the mechanics are genuinely interesting and useful to understand, whether for general financial literacy, a job that touches international business, or simply making sense of the news. But it's worth being clear-eyed from the outset: retail forex trading places an individual, using their own money, into a market where the dominant participants have structural advantages that are very difficult to overcome. The next guides on this site build on that foundation — starting with the terminology, then leverage, then the documented statistics on retail trading outcomes.

• The market is dominated by banks, central banks, corporations and institutional investors, not individual retail traders.
• Currency pairs express relative value — one currency's worth measured against another.
• Even well-resourced institutional participants cannot reliably predict short-term currency movements.
• Understanding this structure is the honest starting point before any discussion of trading strategy or tools.

If your interest is less about the market's mechanics and more about actually moving money across a border — paying someone abroad, receiving a payment, or converting savings — that's a genuinely different topic, covered directly in the currency conversion versus forex trading guide.

This is general educational information about how currency markets work, not investment, trading, tax or legal advice. Situations and regulations differ by country and by individual circumstances — verify anything relevant with an official source or a licensed professional before acting.