Volatility is one of those words that sounds like a verdict — a volatile currency sounds like a bad one. It is not a verdict. It is a measurement, it says nothing whatever about direction, and once you know how to read it, it answers a question that forecasts cannot.
What it measures
Volatility is the size of a currency's movements, without regard to which way they go. Formally it is the standard deviation of returns, usually annualised so that pairs and periods can be compared on one scale.
The key property is that it is direction-blind. A pair that rises steadily by 5% over a year and one that falls steadily by 5% have similar volatility. A pair that ends the year exactly where it started, having swung 10% each way twice, has far more. Volatility describes the journey, not the destination.
Two versions of the number circulate. Realised volatility is calculated from what actually happened. Implied volatility is extracted from the price of currency options and represents what the market is paying to insure against movement — a forward-looking figure, and the closest thing to a market consensus on turbulence that exists. Neither predicts direction, and implied volatility is not a forecast of the rate; it is a forecast of how much the rate will jump about.
The rough ordering of pairs
Without attaching numbers that go stale, the ranking is stable:
- Lowest. Currencies pegged or tightly managed against each other. The Danish krone against the euro barely moves, by design.
- Low to moderate. The major pairs — EUR/USD, GBP/USD, USD/JPY, EUR/CHF. Deep markets, large participants, no shortage of anyone willing to take the other side.
- Higher. Currencies of smaller open economies, and anything tied to a single commodity.
- Highest. Currencies under stress, with thin markets or capital controls, where a modest order moves the price.
A useful implication: a currency can be volatile and cheap to exchange, or stable and expensive. Volatility is about the market; the spread at a counter is about liquidity, handling and how long the notes sit in a drawer. They usually correlate, but not always, and confusing them leads people to expect a bargain on a steady but rarely traded currency.
Volatility clusters
The one genuinely reliable empirical fact in this area: quiet periods tend to be followed by quiet periods, and violent days tend to be followed by more movement.
That is worth something narrow and real. After a large move, the odds of further large moves are elevated for a while — which is an argument for not committing a large amount in the immediate aftermath of a shock if you have the option to wait a week. It is not an argument about which way the next move goes, because there is none.
How to read an annual range
For anyone with a payment to make, the practical form of volatility is the 52-week high and low. Three things to take from it:
Where today sits inside it. Near the low, near the high, or in the middle. This is not a signal — a rate at the top of its range has no obligation to come back — but it tells you whether the number you are looking at is ordinary or unusual for this pair.
How wide the band is. A pair with a 4% annual span and one with a 20% span require completely different amounts of attention on the same sum of money.
What both ends cost you. This is the calculation that settles most questions. Suppose you have €10,000 to convert and the pair has ranged between 0.83 and 0.88 over the year:
| Rate | You receive |
|---|---|
| 0.83 (year's low) | £8,300 |
| 0.88 (year's high) | £8,800 |
| Difference | £500 |
Those figures are illustrative, but the exercise is not. If the gap between the best and worst point of an entire year is tolerable, timing is not your problem and you can stop weighing it. If it is not tolerable, you have learned that the amount is large enough to be worth splitting, hedging or getting professional treatment — which is a far more useful conclusion than any guess about next month.
Why this beats a forecast
A forecast gives you one number and no honest confidence around it. A range gives you the boundaries of ordinary experience and lets you decide whether you can live inside them.
Nothing here removes uncertainty; it puts a size on it. That is why the rate charts on this site show a year of movement with the high and low marked rather than a projected line, and why you will not find a prediction anywhere on the site — for reasons set out in can tomorrow's rate be known.
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Frequently asked questions
How an exchange rate is actually set, what a spread costs on a real transaction, what happens when your income and your debt are in different currencies, and what to check before paying or being paid abroad. They explain mechanisms rather than forecast rates, and each one carries the date it was last revised at the top.
No. We publish no forecasts, price targets or trading calls, and no article recommends buying or selling a currency. Exchange rates over short horizons are close to unpredictable, and a site that pretends otherwise is selling something. What the articles do instead is explain the mechanism, so that you can read the news for yourself.
They are written by the kursdanas.rs editorial team. We accept no commissioned or sponsored articles, and advertising has no influence on what is published or on the order of anything in our tables. Where an article states a figure it names the source, and where we get something wrong we correct it and change the revision date shown on the page.