Most explanations of the currency market assume everyone in it is trying to profit from price. Most participants are not. Understanding who is actually on the other side — and what they want — explains a great deal of behaviour that looks irrational from a chart.
The interbank core
At the centre sit a relatively small number of very large banks. They deal with each other and quote prices to everyone else, and between them they account for the bulk of daily turnover.
Their motive is mostly not directional. A bank quoting both a bid and an ask earns the spread on flow passing through it, and manages the resulting inventory. That is a volume business, not a forecasting one. It is also why quotes stay tight: several institutions compete to be the one your order goes through.
Companies that never wanted a position
A German manufacturer selling into the United States receives dollars and needs euros. An airline buys fuel priced in dollars. A fund manager in Tokyo holds US equities and does not want the currency exposure that comes with them.
All of them trade currency because a commercial decision left them holding the wrong one. They are price-takers executing a necessity, frequently on a schedule — month-end, quarter-end — regardless of level.
This flow is genuinely indifferent to your analysis. It is one reason a technically perfect setup can be run over without explanation: someone had to convert a large sum by a deadline, and your level happened to be in the way.
Central banks
Central banks are the only participants who can change the rules rather than react to them. They influence currencies in three ways:
- Interest rates. Raising rates tends to attract capital and support the currency; cutting does the reverse. This is the dominant long-run driver.
- Words. A hint about future policy can move a currency more than the decision itself, because markets price expectations, not announcements.
- Intervention. Occasionally a central bank buys or sells its own currency outright to defend a level. It is rare, and when it happens the move is violent and one-directional.
Because central banks are the largest single influence on currency value, most macro analysis is ultimately an attempt to anticipate what they will do next.
Funds and speculators
Hedge funds, macro funds and commodity trading advisors do trade to profit, and they take large, sometimes sustained positions. This is the group whose behaviour most resembles what a retail trader is trying to do — at a size that can genuinely move a market.
Their aggregate positioning is one of the few things you can actually observe: the weekly Commitments of Traders report shows how large speculators are positioned in currency futures. It is delayed and it is a partial view, but it is real data about real money, which makes it more useful than most sentiment indicators.
Retail traders
Individuals are a small fraction of total turnover. Two implications follow, and both are worth accepting early.
First, you cannot move the market, and neither can everyone like you combined. Retail positioning does not push a major pair.
Second, your broker may not be routing your trade to the market at all. Many retail brokers internalise — they take the other side themselves and net client positions against each other. That is not inherently sinister, but it means the "market" you are trading is sometimes the broker's book, which matters when you choose one.
What to take from this
- Banks provide most liquidity and mostly earn the spread, not a direction.
- Corporate flow is price-insensitive and deadline-driven; it can override good setups.
- Central banks are the largest single driver, chiefly through interest-rate expectations.
- Funds are the speculative money that matters, and COT data gives a partial view of it.
- Retail is a small slice — and your broker may be your counterparty.
That completes the foundations. Module 2 turns to mechanics: how brokers make money from you, what a spread really costs, and the leverage maths that decides how long an account survives.