A currency strength meter is a tool that measures how strong or weak each currency is against a whole group of other currencies at the same time - instead of against just one, the way a normal exchange rate does.
If you've ever looked at EUR/USD falling and wondered "is the euro weak, or is the dollar just strong?" - that's exactly the question a strength meter answers.
The problem with single exchange rates
An exchange rate always involves two currencies. When EUR/USD drops 2%, there are three possible explanations:
- The euro weakened
- The dollar strengthened
- Some combination of both
A single pair can't tell you which one happened. In Q3 2022, EUR/USD fell below parity for the first time in 20 years and headlines declared the euro was collapsing. A strength meter told a different story: the euro was roughly holding its ground against most currencies - it was the dollar that was exceptionally strong against everything.
How a currency strength meter works
Most meters follow the same core logic:
- Take a basket of currencies - FX Compass tracks 16 majors (EUR, USD, GBP, CHF, JPY, CAD, AUD, NZD, SEK, NOK, DKK, PLN, CZK, HUF, UAH, RUB).
- Compute every cross rate - with 16 currencies that's 120 unique pairs.
- Average each currency's daily move against all the others. FX Compass uses a geometric mean of pairwise exchange-rate changes, so no single pair dominates.
- Accumulate the daily changes into an index that starts at 100. A value of 105 over a selected period means the currency gained roughly 5% against the average of the basket.
The result: one line per currency, and you can see at a glance who is genuinely strong, who is weak, and who is just drifting with the pack.
Some trading-oriented meters only use intraday moves of 8 major pairs. FX Compass instead uses official daily reference rates from the European Central Bank and other central banks, which makes it better suited to tracking real trends over weeks, months, and years.
How to read a strength meter
- Rising line - the currency is gaining against the basket
- Falling line - it's losing against the basket
- The gap between two lines - their relative performance. If USD is at 104 and EUR at 99 over the same period, USD outperformed EUR by roughly 5%.
- Rebasing matters - when you change the time range, all lines restart at 100, so "strong" always means strong over the period you selected.
As of July 2026, for example, the strength meter shows the Hungarian forint as the top performer of the past 12 months (up about 12%), while the Japanese yen sits at the bottom (down almost 10%). No single exchange rate could show you that picture directly.
The mistake almost everyone makes: ignoring inflation
A currency can look stable on the strength meter while quietly losing purchasing power at home. If a currency's exchange rate is flat but its domestic inflation runs at 15%, holders of that currency are still getting poorer.
That's why FX Compass has a real (CPI-adjusted) mode: it adjusts each currency's strength for its domestic consumer-price inflation. Toggle it on and you'll see which currencies truly preserved buying power - often a very different ranking from the nominal one.
What a strength meter is NOT
- Not a trading signal. It shows trends and relative performance; it doesn't predict tomorrow's moves.
- Not a real-time tick feed. Data updates once per trading day, after the ECB publishes reference rates (~16:00 CET).
- Not trade-weighted. Every currency in the basket counts equally, unlike indexes such as DXY that weight by trade volumes. Why that choice changes the answer.
Try it yourself
The fastest way to understand a strength meter is to use one:
- Open the live currency strength dashboard and select a few currencies
- Check any single currency's profile, e.g. the US Dollar strength index
- Or compare two currencies head-to-head, e.g. EUR vs USD
For the full calculation details, see What is a Currency Strength Index?