Money goes where it is paid more
A currency is something you can hold, and holding it earns whatever the country’s interest rate pays. If one central bank pays more than another, holding that currency is worth more, all else being equal, and money moves toward it. That is the whole mechanism, and it is why a rate decision moves a currency pair further in a minute than a week of chart patterns.
The gap, not the level
What matters is not that a country pays four percent — it is that it pays four while the other side of the pair pays one. That gap is the rate differential, and a currency pair is a ratio between two economies, so it responds to the difference between them. This is also where swap comes from: holding the higher-paying currency usually credits you a little each night, and holding the lower-paying one usually costs you.
The expectation moves first
By the time a central bank raises a rate, the market has usually been pricing that rise for weeks. The move happens as the expectation builds, which is why a currency can fall on the day of a rate rise: the rise was expected, and what was said afterwards suggested fewer to come. Trading a decision as though the number itself were news is the most common way to lose money on a rate day.
Real rates, not headline rates
A rate of five percent while prices rise six percent is a real return of about minus one. Money is not attracted by the headline number but by what is left after inflation, which is why an inflation figure can move a currency as hard as a rate decision — it changes the real return without the central bank doing anything.
What this is worth on a chart
It tells you which way you would rather lean over weeks, and nothing about where to enter today. The differential is a background pressure, not a signal: it explains why a pair trends for two months, and it will not save a trade taken at the wrong level with no stop.
In short
| The driver | What people expect the rate to be, not what it is |
|---|---|
| What matters | The gap between the two currencies’ rates |
| Where you feel it | Swap, charged or paid every night |
| Real rate | The rate minus inflation |
| On the chart | A lean, never an entry |
Common questions
Why did the currency fall when the rate went up?
Because the rise was already priced in and something in the statement suggested fewer rises ahead. The market trades the change in expectation, not the announcement.
Do I need to follow rates to trade at all?
No, but it explains why a pair keeps trending against every reversal pattern you draw. Knowing the direction of the pressure stops you fighting it repeatedly.
Is this the same as the carry trade?
The carry trade is holding the higher-paying currency to collect the difference. It works until the pair moves against you, and it moves fast when it does — the interest is small and the price move is not.
Trading forex and CFDs on margin carries a high level of risk. Most retail accounts lose money. Nothing on this page is financial advice or a recommendation to trade.