Why the nightly scan stopped
For eleven weeks a nightly options-flow scan ran, and this site published it. It stopped because the evidence said it could not do what it was for. Here is what replaced it.
Yuxuan (Ewan) Li · Toronto
Builds AI systems. Applies them to markets. Trains with the same systematic bias.
Senior software engineer — MCP servers, AI agents and LLM integrations at scale. This site is a bio, a blog, and my paper trading, published the same day.
Writing
All postsPaper trading
The trading deskLatest sessionTue, Nov 3, 2026
Paper trading, not investment advice.
Selected projects
All projectsTrading desk
live
The runner, data contract and public pages behind this site’s trading section.
- Private repository
- Desk dashboard
- Engine and schedule
Systematic equity research
on paper
A pre-registered research harness for automatable US-equity rules, and the strategy it picked.
- Private repository
- Systematic equity strategies on the desk
compact-lens
released
A Claude Code mod that shows what a compaction drops and keeps, pins facts through it, and lets the summary be edited and re-applied.