BTC: Binary Coin Days Destroyed — Trailing Year

Bitcoin Binary Coin Days Destroyed — Trailing Year was 0 on 7 Nov 2026 (latest daily value).

Bitcoin binary coin days destroyed: 1 on days when coin days destroyed are above their past-year average, 0 when not.

Why use it. It flags the days when unusually old coins move, which cluster when long-term holders sell. How to read it. Runs of 1 mean persistent spending of old coins, as in late bull markets; runs of 0 mean holders are sitting tight. It is a flag, not a forecast.

Calculation. Exact definition: A daily 0-or-1 comparison of header-time coin days destroyed with its trailing 365-daily-observation mean. One means strictly above the trailing mean; zero includes equality or below. It is a threshold comparison, not a probability or price forecast. The window includes the plotted day and uses 365 adjacent UTC daily observations rather than a leap-adjusted year. Missing input or warm-up remains undefined. From local canonical spent value and clamped header-time ages, calculate daily CDD and compare it with the arithmetic mean of the last 365 daily CDD observations. Return 1 only when CDD exceeds that mean, otherwise 0. The weakest input finality applies, including partial daily values.