Install, open the free Demo right away, then activate your license and connect your data key to go live.
1. Open LOF — the Demo feed runs immediately, no key or license needed.
2. Bought a license? Click License (bottom-right) → paste your LOF-… key → Activate. The Real and Live feeds unlock on this device.
3. Click Set API Key and paste your own Databento key to stream real order flow. Need history first? Use Download history.
No license yet? See pricing →