compare-odds

name	compare_odds
description	Cross-bookmaker comparison workflow — find the same selection at every book, surface the best price, and flag value.
triggers	["best price","best odds","compare odds","across books","across bookmakers","line shop","arbitrage","value bet"]

Comparing odds across bookmakers

The data plane carries many books behind the same capability tags — use that to line up one selection across all of them.

Procedure

1. Identify the event once. Resolve the fixture (teams/race, start time) before touching prices, so every book's market is matched to the same event.
2. Collect prices per book. Use your market/price tools for each available book. Record, for every quote: book, selection name as that book spells it, decimal odds, and the fetch time. Skip a book rather than guess if its market is missing.
3. Best price: call best_price over the collected quotes.
4. Value check (when asked, or when a sharp book is present):
   • Take the full market at the sharpest book available and call vig_removal for a fair probability.
   • Call expected_value with that fair probability against the best offered odds.
   • Only describe a price as "value" when expected_value > 0; show the number.
5. Report: a compact table of book → odds (with fetch times), the best price, the fair probability and its source book, and EV if computed. Cite which tools/providers every figure came from.

Rules

• Same selection, same market type, same line — never compare a -10.5 spread at one book with -11 at another as if equal.
• Prices move: include fetch times; never present a price as current without one.
• Advisory only: you report and compare — you cannot and do not place anything.