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Everything — 115 pages

• Accuracy and correctionsDocsHow errors in WeBall's guides, documentation and grades are found, fixed and disclosed — and how to report one you have spotted.
• American oddsGlossaryThe +/− format used in the US, showing profit on a $100 stake or the stake needed to win $100.
• ArbitrageGlossaryBetting both sides at different books at prices that guarantee a profit whatever happens.
• Arbitrage CalculatorCalculatorCheck whether two prices at different books guarantee a profit, and split your stake to lock the same return either way.
• BankrollGlossaryThe money set aside specifically for betting, separate from everything else you own.
• Bankroll and RiskGuideStaking, unit sizing, drawdowns and the uncomfortable arithmetic of how many bets it actually takes before your results mean anything at all.
• Betting Markets ExplainedGuideEvery market type on a sportsbook board — moneylines, spreads, totals, props, alternates and parlays — and how much each one actually costs you to bet.
• Betting StrategyGuideLine shopping, beating the closing line, arbitrage, promos and the angles that separate profitable bettors from busy ones — ranked by what actually works.
• Big Spreads and Blowouts in College FootballGuideWhy 30-point favourites are a different bet entirely, how backdoor covers become structural, and what actually happens in a fourth quarter nobody needs.
• Breakeven win rateGlossaryThe percentage of bets you must win at a given price just to avoid losing money.
• Breakeven Win RateGuideThe win percentage a bet needs just to avoid losing money, why it is 52.4% and not 50%, and what that single number reframes about your record.
• Breakeven Win Rate CalculatorCalculatorFind the win percentage a bet needs just to break even at a given price — the bar every wager has to clear before it profits.
• Closing lineGlossaryThe final price on a market immediately before the event starts.
• Closing line valueGlossaryWhether the price you got was better than the price the market settled at by game time.
• Closing Line Value (CLV)GuideWhy beating the closing line predicts long-run profit better than your record does, how to measure it, and what it costs you when books notice.
• Closing Line Value CalculatorCalculatorCompare the price you got against the closing line to see whether you beat the market — the best early signal that a process works.
• College Football BettingGuideHow to bet college football — spreads, totals, blowout risk and the market inefficiencies that survive in a 130-team sport nobody can watch all of.
• College Football Spread BettingGuideHow college football point spreads are set, why they move so much more than NFL lines, and where the soft numbers actually hide on a 60-game Saturday.
• College Football TotalsGuideWhy tempo drives college football totals more than talent does, how scheme and clock rules shape the number, and where over/under lines get mispriced.
• Confidence scoreGlossaryHow much data sits behind a grade — sample depth, book coverage and consistency, on a 0 to 1 scale.
• CorrelationGlossaryThe degree to which two betting outcomes move together — the thing that makes some parlays worth building.
• Correlation in Same-Game ParlaysGuideWhich same-game legs actually move together, with the measured coefficients — the positive stacks, the negative traps, and where books have already priced it.
• CoverGlossaryBeating the point spread, as opposed to simply winning the game.
• Decimal oddsGlossaryOdds expressed as the total return per unit staked, including the stake itself.
• EdgeGlossaryThe gap between your estimated probability and the probability the price implies. Positive means value.
• Editorial policyDocsHow WeBall's guides and documentation are written, reviewed and corrected — and the claims we will not make regardless of how well they would perform.
• Expected valueGlossaryThe average result of a bet per unit staked if it could be repeated indefinitely.
• Expected Value CalculatorCalculatorCalculate the expected value of a bet from your win probability and the price on offer, in both percentage and dollar terms.
• Expected Value in BettingGuideHow to turn an edge into money, why a +EV bet still loses constantly, and the estimation problem that makes most EV calculations worthless.
• Fair probabilityGlossaryThe market's honest opinion — implied probability with the bookmaker's margin removed.
• FavoriteGlossaryThe side expected to win, priced with negative odds or laying points.
• Flat bettingGlossaryStaking the same amount on every bet regardless of how good it looks.
• Flat BettingGuideWhy staking the same amount on every bet beats clever staking for most bettors, what it gives up, and when you have earned the right to move on.
• Free betGlossaryA promotional wager that pays only the profit, not the stake, if it wins.
• Free Bet Conversion CalculatorCalculatorWork out what a free bet is really worth in cash, since the stake is not returned and long shots convert at a higher rate.
• HedgeGlossaryBetting the opposite side of a wager you already hold to reduce risk or lock in profit.
• Hedge CalculatorCalculatorFind the stake on the other side that locks in a guaranteed profit, and see exactly what you keep either way.
• HoldGlossaryThe share of all money wagered on a market that the sportsbook keeps regardless of the result.
• Hold CalculatorCalculatorWork out exactly how much a sportsbook is keeping on any market, from a standard spread to a wide-margin player prop.
• HookGlossaryThe half point attached to a line, as in −7.5 rather than −7.
• How the edge is computedDocsThe exact four-step sequence behind every number on an edge badge — sample, model, de-vig the market, and publish the difference between the two.
• How we make moneyDocsWhat WeBall costs, what the coming Plus and Pro tiers buy and never buy, what stays free, and the arrangements that do not influence the product.
• Implied probabilityGlossaryThe chance of an outcome as expressed by its odds, including the bookmaker's margin.
• Implied ProbabilityGuideHow to convert American, decimal and fractional odds into the probability they imply — and why that number is always slightly higher than the truth.
• Implied Probability CalculatorCalculatorTurn any betting odds into the probability they imply, and turn a probability back into the odds that would price it fairly.
• Kelly criterionGlossaryA staking formula that sizes each bet to the size of its edge, maximising long-run bankroll growth.
• Kelly Criterion CalculatorCalculatorWork out the mathematically optimal stake for a given edge, with fractional Kelly options because full Kelly is far too aggressive.
• Key numbersGlossaryThe margins that occur far more often than others, mainly 3 and 7 in football.
• Known limitationsDocsWhere WeBall's model is weakest, stated plainly — thin samples, de-vig bias, garbage time, correlation, and the things it does not model at all.
• LimitGlossaryThe maximum a sportsbook will accept on a market — or on you specifically.
• LineGlossaryThe number a sportsbook posts on a market — a spread, a total, or a price.
• Line shoppingGlossaryChecking multiple sportsbooks for the same bet and taking the best available price.
• Line ShoppingGuideWhy taking the best available price is the most reliably profitable habit in betting, what half a point is actually worth, and how to do it efficiently.
• Markets coveredDocsEvery market WeBall can grade, which entity it is about, and the statistical model behind it — plus an honest note on what is shown but not rated.
• Methodology transparencyDocsEverything WeBall publishes about how its grades are made, in one place — and why an organisation byline obliges us to show more, not less.
• MiddleGlossaryBetting both sides at different numbers so that certain results win both bets.
• Model probabilityGlossaryWeBall's own estimate of how often a bet wins, before comparing it to any price.
• MoneylineGlossaryA bet on which side wins outright, with no spread involved.
• Moneyline BettingGuideThe simplest bet on the board — pick the winner — plus why favourites pay so little, when the moneyline beats the spread, and how three-way markets work.
• NFL BettingGuideHow to bet the most efficient market in sports — key numbers, teasers, weather, injury designations, and where value still survives on an NFL board.
• NFL Key Numbers — Why 3 and 7 MatterGuideRoughly one NFL game in seven lands on a three-point margin. Here is what that does to half points, buying points, teasers and where to take a spread.
• NFL Spread BettingGuideHow NFL point spreads are built, how they move through the week, and why getting the right number matters more than picking the right side.
• NFL TotalsGuideWhat actually drives NFL over/under numbers — pace, weather and situation — and why the public's appetite for overs shades the market against you.
• No guaranteesDocsWhat WeBall's grades are and are not, why no outcome is ever guaranteed, and the claims this product will never make about your results.
• No-Vig Fair OddsGuideHow to strip the bookmaker's margin out of a market to find what it really thinks — the single most important calculation in judging any bet.
• No-Vig Fair Odds CalculatorCalculatorStrip the bookmaker's margin out of a two-way or three-way market to see what the market really thinks before it takes its cut.
• No-vig oddsGlossaryOdds with the bookmaker's margin normalised out, showing what the market actually believes.
• Odds boostGlossaryA promotion that improves the price on a specific bet above its normal number.
• Odds Boost EV CalculatorCalculatorDecide whether a profit boost is actually worth taking by comparing the boosted price against the market's fair probability.
• Odds ConverterCalculatorConvert American, decimal and fractional odds into each other and into implied probability, instantly and in both directions.
• Opening lineGlossaryThe first price a sportsbook posts on a market, before it takes meaningful action.
• ParlayGlossaryA single bet combining several selections, all of which must win to pay out.
• Parlay CalculatorCalculatorAdd up any number of legs to see the combined odds and payout, plus the fair price the parlay should pay without the vig.
• Parlays and CorrelationGuideWhy parlays pay less than they should, how the vig compounds with every leg, and the one mathematically sound reason to build one anyway.
• Player PropsGuideSofter numbers, much higher hold and much lower limits — how player prop markets work, why books can't price them carefully, and what that costs you.
• Point spreadGlossaryA margin handicap that makes an uneven matchup close to a coin flip.
• Point Spread BettingGuideHow a handicap turns an uneven game into a coin flip, what covering means, and why the half point is the most contested inch in betting.
• Privacy PolicyDocsWhat data weball.app collects, why, who processes it, and what we deliberately do not collect — written to describe the actual system.
• Prop betGlossaryA bet on something other than the final result — usually an individual player's statistical total.
• PushGlossaryA tie against the number — the bet is void and your stake is returned.
• Regression to the meanGlossaryThe tendency of extreme performances to be followed by more ordinary ones.
• Responsible GamblingGuideHow to set limits that actually hold, how to recognise when betting has stopped being a choice, and where to get help — for yourself or someone else.
• Reverse line movementGlossaryA line moving toward the side receiving fewer bets — a classic sign of sharp money.
• Risk of ruinGlossaryThe probability of losing your entire bankroll before your edge has time to show.
• RoadmapDocsWhat WeBall does today, what is being built next, and the honest list of things a betting assistant should do that this one does not do yet.
• Same-game parlayGlossaryA parlay whose legs all come from one game, priced to account for how they relate to each other.
• Sample sizeGlossaryHow many observations sit behind a number — and whether it means anything yet.
• SharpGlossaryA consistently profitable bettor, or the money such bettors move a line with.
• SlateGlossaryEvery game and market currently available to bet across all covered sports.
• Soccer BettingGuideThree-way lines, Asian handicaps, goal totals, corners and cards — how soccer markets differ from American sports, and where the 2026 World Cup fits.
• Sports and leagues coveredDocsWhich leagues WeBall prices and grades, which have a dedicated data warehouse behind them, and where coverage is thinner than we would like it to be.
• Sports Betting FundamentalsGuideHow odds, lines and settlement actually work — the vocabulary and mechanics everything else in betting is built on, explained without jargon.
• SquareGlossaryA casual bettor, and by extension the predictable side of the market they bet.
• SteamGlossaryA fast, uniform line move across many sportsbooks at once, driven by heavy informed money.
• Team TotalsGuideBetting one side's scoring instead of the whole game — when it is the cleaner version of your opinion, and what the extra hold costs you for the privilege.
• TeaserGlossaryA parlay where you move each spread or total in your favour in exchange for a shorter payout.
• Teaser Math and Wong TeasersGuideWhy most teasers lose money, the specific two-team NFL teaser that historically did not, and how to check whether it still clears the bar.
• Terms of UseDocsThe terms governing use of weball.app — what the service is, what it is not, eligibility, acceptable use and the limits of our liability.
• The boardGlossaryWeBall's home canvas — a generative workspace that composes itself around the games and edges you're looking at.
• The confidence scoreDocsWhat confidence measures, what moves it, and why a high-edge low-confidence bet is graded THIN DATA rather than treated as the best bet on the board.
• The Kelly CriterionGuideThe formula for optimal bet sizing, why full Kelly is dangerous in practice, and how fractional Kelly trades a little growth for a lot less volatility.
• The Math of Sports BettingGuideImplied probability, vig, expected value, closing line value and Kelly staking — the arithmetic that decides whether a bet is worth making.
• The verdict grade scaleDocsAll seven WeBall grades in one place — what each one means, what to do with it, and why two of them are deliberately not ratings at all.
• TiltGlossaryBetting emotionally after losses — chasing, staking up, and abandoning your process.
• TotalGlossaryA bet on whether combined scoring finishes above or below a set number.
• UnderdogGlossaryThe side expected to lose, priced with positive odds or receiving points.
• UnitGlossaryA standard bet size expressed as a fixed percentage of bankroll, usually 1%.
• Value betGlossaryA bet whose price is better than the true probability of the outcome.
• VarianceGlossaryThe spread of outcomes around your expected result — why good bettors have terrible months.
• VerdictGlossaryWeBall's grade for a single bet — how the model's probability compares to the best available price.
• VigGlossaryThe bookmaker's built-in margin — the reason both sides of a market add up to more than 100%.
• Vig, Juice and the OverroundGuideWhat the bookmaker's margin actually is, how to measure it on any market, and why the hold on player props quietly makes them almost unbeatable.
• Warning Signs of Problem GamblingGuideWhat problem gambling looks like from the inside, including the signs that are easiest to explain away, and what to do once you have noticed them.
• Week 0 and the Early College SeasonGuideWhy the opening weeks of college football produce the softest lines of the year and the worst information, and how to bet the gap without guessing.
• Where to Get Help with GamblingGuideHelplines, self-exclusion programmes and sportsbook tools — what each one does, what to expect when you use it, and how to help someone else.