MargusMargus Education
Learn the language before risking money
Straightforward explanations of odds, markets, promotions, and risk—built to help you understand the product, not push you toward a wager.
Start with a topic
Core concepts
Sports betting glossary
Clear definitions for odds, bet types, offers, market movement, and account terminology.
FundamentalsHow betting odds work
Understand American and decimal prices, implied probability, vig, and expected value.
Bet typesSpreads, totals, moneylines, and props
Learn what settles each common market and where house rules matter.
OffersRead promotions before opting in
Decode bonus bets, deposit matches, wagering requirements, and expiration rules.
RiskBankroll and responsible play
Separate entertainment money, choose limits, and recognize when to stop.
Read in depth
Betting guides
How to Read Betting Odds: American, Decimal & Fractional
Learn how to read betting odds in American, decimal and fractional formats, with worked NFL and Premier League examples and a quick conversion cheat sheet.
Learn · BeginnerImplied Probability: How to Calculate It From Odds
What implied probability is, how to calculate it from American, decimal and fractional odds, how to remove the margin, and how to use it to find value bets.
Learn · BeginnerLine Shopping: How to Find the Best Odds Every Time
What line shopping is, why comparing odds across sportsbooks and prediction markets matters, worked NFL and Premier League examples, and a simple routine.
Learn · IntermediatePrediction Markets vs Sportsbooks: Which Has Better Odds?
How prediction markets like Kalshi and Polymarket differ from sportsbooks: pricing, fees, liquidity, limits and regulation, and how to compare their odds.
Learn · BeginnerWhat Is Vig? Juice, Overround & Bookmaker Margin
What vig, juice and overround mean, how to calculate a bookmaker's margin on two-way and three-way markets, and how to bet into lower-margin prices.
Prediction markets · BeginnerKalshi Odds vs Sportsbooks: How Kalshi Works
Kalshi odds explained: how event contracts are priced, how fees work, where to check availability, and how Kalshi compares with sportsbook odds today.
Prediction markets · IntermediateKalshi vs Polymarket: Fees, Prices and Sports Compared
Kalshi vs Polymarket compared for sports: contracts, fees, liquidity, regulation and settlement rules, plus how to check which has the better price today.
Prediction markets · BeginnerPolymarket Odds vs Sportsbooks: Polymarket US Guide
Polymarket odds explained: how Polymarket US contracts are priced, its published fee formula, availability, and how its prices compare with sportsbooks.
A–Z reference
Sports betting glossary
52 plain-language definitions across money, bet types, odds, trading, offers, markets.