Data sources & update cadence
LIVE (free, no key): BTC price via CoinGecko API · daily. Fear & Greed index via alternative.me · daily.
ESTIMATED (static): MVRV Z-Score, NUPL, SOPR, Puell Multiple — hardcoded from last known public readings (June 2026). To make these live, add your Glassnode API key to the GLASSNODE_KEY constant at the top of the <script> block. Free tier covers MVRV and a few others at daily resolution.
CORS: Fetches try direct first, then fall back to allorigins.win / corsproxy.io proxies — works from file:// and any hosted URL.
Auto-refresh: page fetches live data on load and every 6 hours if left open.