← journal·2026-09-29
Full-Stack Notes: Shipping Stock Picks-Style Paper Trading Loops
Not financial advice. Verify claims independently.
From the RT/SOFT engineering journal:
OpenAI DevDay lands Tuesday, Sep 29, 2026 — useful calendar context for anyone shipping AI-assisted tooling into trading or fintech client apps this week.
Paper loops win when they feel real:
- Realtime quotes with honest lag indicators
- Deterministic paper fills (documented rules, not vibes)
- Watchlists + alerts that survive AMC bursts
- AI assist (post-DevDay) only behind human approval
Stack sketch
- Fan-out service with symbol sharding
- JS/RN client with Skia-friendly tapes
- Feature flags for earnings banners
- Affiliate-ready CTA back to the practice app
Ship the loop; keep live brokerage behind a separate, disclosed door.
Not financial advice. Verify claims independently.
Put it on a live wire
Stock Picks runs on RT/SOFT — open the paper app and watch the same fan-out path that powers this latency dashboard.
$ open Stock Picks →