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The Smart Lines blog
In-depth guides on sports betting math, analytics and strategy, written to help you bet with an edge.
Latest articles
No-Vig Odds: How to Remove the Sportsbook’s Margin
What the vig is, how to calculate no-vig (fair) odds with the proportional and power methods, and why the method can flip a bet from +EV to −EV.
Implied Probability: How to Turn Betting Odds into Percentages
Convert American, decimal and fractional odds to implied probability, find your break-even rate, and see why both sides add up to over 100%.
The Kelly Criterion for Sports Betting
How to size a bet from its edge with the Kelly criterion, what overbetting costs, and why most bettors stake a fraction of full Kelly.
How to Read Betting Odds: American, Decimal and Fractional
A plain guide to American, decimal and fractional odds, the main bet types, and why the same bet pays differently at different sportsbooks.
Arbitrage Betting Explained
How arbitrage betting uses price differences between sportsbooks to profit whatever the result, and the risks that can break it.
5 Mistakes Bettors Make When Analyzing Sports Data
Small samples, cherry-picked trends and judging bets by results: the five traps that make bettors think they have an edge, and how to avoid them.
In the works
Guides our team is writing now
Using Historical Data for Better Bets
Leverage past sports results and trends to inform your betting decisions and gain an edge.
Z-Score in Sports Analytics
Use z-scores to identify statistical outliers and spot meaningful trends in sports data.
How Affordable Analytics Tools Are Changing the Way Fans Enjoy Sports
Explore how accessible analytics tools empower fans to analyze games and make informed decisions.