Advanced concepts
Closing line value, steam, middling, arbitrage and the ideas that separate a priced bet from a hunch.
Closing Line Value: The Scoreboard That Matters
Closing line value compares the price you got to the price at kickoff. How to measure CLV in points and percentages, and where the metric misleads you.
Expected Value: The Only Betting Concept That Matters
Expected value betting explained with exact arithmetic: the EV formula, break-even probabilities, why +EV bettors lose for months, and where edges come from.
Other topics
Odds & probability
Reading American, decimal and fractional prices, converting between them, and turning any of them into an implied probability.
Market mechanics
Vig, hold, line movement, limits and the operational reasons a sportsbook prices the way it does.
Bet types
Spreads, totals, moneylines, parlays, teasers, props and futures — what each one costs you in expectation.
Bankroll & staking
Flat staking, percentage staking, Kelly, and the maths of variance, drawdown and risk of ruin.