Feed the chart engine. Accepts the clean seed file (ts,o,h,l,c) or a raw Databento ohlcv-1m export (any date range — it auto-filters to the lead NQ contract by volume). Re-uploading the same dates is safe: rows are upserted. Weekly top-up: pull the last week from Databento, drop it here, done.
The level-line overlay for trade charts (levels.csv from the certified engine: tf,price,dir,birth,origin,sess_end). Upsert-safe.
Signups from the website form.