Calendar-month return heatmap · monthly klines from Binance / MEXC
BTCUSDT — Monthly Seasonality
Month-over-month close-to-close return. Green = up, red = down. Colour magnitude scales to the largest move in view.
Seasonality Significance Test
OLS regression of month-over-month % returns on 12 monthly dummy variables (no intercept). Each coefficient is the month's mean return; a month is seasonally significant when its 95% confidence band excludes zero (p ≤ 5%, highlighted).