API key
The key is kept in this browser only (local storage). Userscript for Tampermonkey: pearlcast-loader.user.js (loads the current client from this server on every page load)
Forecast
Models (skill check vs shuffled prices)
Stored data per timeframe
Closed candles only. Sent by the userscript from SafeTrade (incremental every minute, or the full history with "Re-sync history"). The models use the 15m candles.