Mayer Multiple
The Mayer Multiple is Bitcoin's price divided by its 200-day moving average — a simple gauge of how stretched price is from its long trend.
0.95×Fair valueas of 2026-05-24
At $76,620, BTC trades -5% versus its 200-day average ($80,547). Readings above 2.4× have historically marked expensive zones, below 0.8× accumulation zones.
Backtest a DCA strategy →History
Off daily close through 2026-05-24 (btc-history.json). Price lags ~30d; live tail is a Phase 2 stitch.
How it's computed
Take the daily close and divide it by the 200-day simple moving average of the close (Computed off the daily close through the latest available row in btc-history.json (a price-only community feed that trails the live market by roughly 30 days); the tail therefore lags today by about a month. The series begins once 200 days of history exist.)
Band guide
< 0.80×Undervalued
0.80×–1.20×Fair value
1.20×–2.40×Elevated
≥ 2.40×Historically expensive