Reference rate range study — trailing 12 months

Every figure below comes from the same dated, source-linked rows that the FXpeek CSV and JSON API serve. The study shows how wide each pair's reference band was over the last 12 months, which is what matters when you must pick a defensible rate for an invoice, a payout, or a close file.

Reproduce this

Pull the same rows as CSV at /api/csv?from=USD&to=EUR&days=365 or as JSON at /api/history?from=USD&to=EUR&days=365. Each row carries a date and a source-linked reference URL, so the study can be reproduced and audited rather than trusted as a black box.

Reference data only; not a bank quote, settlement rate, tax-authority rate, or financial advice. See the methodology.