Harwinder Sekhon
08eae15e11
Tiingo's free /tiingo/fx/top publishes only a two-tier indicative spread for gold ($0.10 liquid hours / $0.70 rollover+news; verified on 273 production samples + live probes) — mid ± a posted increment, not executable depth, so it can never validate the $0.30 backtest cost assumption. Removed one day after shipping: tiingo_provider.py, the sampler/quote plumbing in telegram_bot.py, the channel_spread_detail config knob and tiingo_api_key resolver, and Module 14's Tiingo tests (221 -> 210). CLAUDE.md documents the verdict: do not re-add a spread display from Tiingo's free FX feed. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BoZKi67Ct6QTeiFJmybXSw