All data stored at 1-minute atomic resolution in the cloud. Switch between any timeframe — nothing is lost,
nothing is re-downloaded. The cloud database keeps collecting even when your browser is closed.
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Cloud persistence. Every 1-minute candle is upserted to your Cloudflare D1 database via a Worker endpoint.
When you reopen the page — even from a different device — the full history is loaded from the cloud. The browser's
localStorage is used as an instant cache so the chart appears immediately on load, then syncs with the cloud.
Custom timeframes. Type any value in the input: 49m, 6m, 2h,
90s. Minimum is 60s. All timeframes derive from the 1-minute base array.
This tool is for research/education, not financial advice.