Bet types
Spreads, totals, moneylines, parlays, teasers, props and futures — what each one costs you in expectation.
Moneyline, Spread and Total: The Three Core Markets
Moneyline vs spread vs total, explained by what each one actually asks. Exact payout math, why the half point matters, and which market fits which opinion.
Parlay Math: Why the Fun Bet Is the Expensive Bet
Parlay odds are multiplied decimal prices — and the margin multiplies too. Exact parlay math: three-leg payouts, hold by leg count, and same-game pricing.
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.
Bankroll & staking
Flat staking, percentage staking, Kelly, and the maths of variance, drawdown and risk of ruin.
Advanced concepts
Closing line value, steam, middling, arbitrage and the ideas that separate a priced bet from a hunch.