Roan (backend, HFT-style execution, quant systems) starts honest: nobody replicates Bloomberg's licensed data moat at home. Real-time exchange feeds are contractually locked. A terminal is seven layers — Data, Analyst, News, Reasoning, Report, Alert, Visual Dashboard — and only the Data layer is protected by contracts. The other six are workflow and integration, and that's the part that just became solvable at consumer scale.

His numbers: a Bloomberg seat is about $27,660 a year; this setup is roughly $3,000 a year for about 70% of the utility. Prior walls he'd hit for a year: real-time monitoring across hundreds of sources, and dashboards that needed a frontend engineer.

This is a build guide, not a P&L claim. Analysis only, no orders.