Sanity checks for every fair price you compute
Four cheap checks catch every broken margin removal: the sum, the bounds, the ordering and the distance from the raw price. Run them per market.
PNCLAPI
Tool notes
Dated notes on the numbers behind the Pinnacle odds API: fair odds, margins, conversions and request budgets.
Store odds as decimal and convert at the edges
Decimal is the format the API serves and the only one your database should hold. American and fractional are display languages, translated at the edge.
From a model probability to a price you can take
Your model says 62%. What price makes that a bet? The conversion from probability to a fair decimal floor, and the margin check that follows.
What the overround tells you about a market
The overround is the margin made visible. What its size says about a market, why it moves, and how to use it as a data-quality check on API prices.
Turn a Pinnacle price history into a fair price history
Margin removal belongs on every snapshot, not the average. The per-row rule, the completeness check and the cutoff that make a fair series trustworthy.
Proportional vs power: why no-vig methods disagree
Two margin-removal methods turn the same prices into different fair odds. See where proportional and power no-vig diverge, with a worked example.