How currency strength is measured here
We take each currency's exchange rate against the US dollar today and compare it with the rate roughly seven days ago. A currency that now buys more dollars than a week ago has strengthened; one that buys fewer has weakened. The percentage shown is that weekly change, ranked from strongest to weakest.
Why it matters
Relative strength tells travellers when their money goes further, helps importers and exporters time payments, and gives a quick read on market sentiment. A broadly strong dollar, for example, usually pushes most other currencies down the board at once.
Reference only
These are mid-market reference figures for information, not trading advice. See our terms.