Historical return patterns for a pair — by calendar month, or by day of the week. Computed from up to two decades of ECB reference rates.
Best month
Worst month
Sample
of monthly history
Positive months
of calendar months avg >50% up
Each cell is the close-to-close % return for that calendar month. The Avg row is the mean across years and Win% is how often that month closed up. Seasonality is a historical tendency, not a prediction — central-bank regime shifts can break it.
Source: Frankfurter (ECB) via our cached proxy. Free, no key.