In-play simulator, running now
Live betting is placing a bet after the game has started, at prices the sportsbook recalculates after every play from the score, the clock and who has the ball.
The example bet, right nowCash-out offer $0.00Locked in by hedging $0.00Change the bet
Simulation · NFL · prices are illustrative
Chiefs win probability
This drive starts with 7:42 leftBills: 60%
Chiefs have the ball · 1st & 10 at KC 25
Last three playsnewest on top
Live pricespause after every play
A crossed-out price is the old one. ▲ that side pays more than before, ▼ it pays less.
A teaching model, not a live feed. Prices carry a built-in margin like a real book, every play briefly suspends the markets, big plays for longer, the way bet delay works in practice, and the cash-out offer uses the simulator's own 6% haircut.
Replays from the simulator
Three plays from the simulator where the price did something worth a second look. Load one, pause on the snap that matters, and step through the repricing at your own speed.
Down three near midfield, the Chiefs keep the offense on the field. One snap moves their moneyline from +160 to -130, and the drive ends in the end zone.
Buffalo is at the 14, one score from a ten-point lead. A pick in the end zone freezes all three markets for the review, then the Chiefs reopen at +110, in from +280.
Tied at 27 with 58 seconds left. Four snaps and a timeout set up a 50-yard try, and the Chiefs moneyline goes from -405 to -2530 as it splits the uprights.
01the basics
What is live betting? It is placing a wager after the game has started, also called in-play betting. The price is recalculated after every play from the score, the clock, possession and field position.
Ask ten bettors what is live betting and most will answer with the mechanics instead: how does live betting work once the ball is snapped, and why does the price keep changing? Instead of locking in a price on Sunday morning, you bet while the ball is in play. The number on the screen reflects everything that has happened up to that second: the score, the clock, who has the ball, the down and distance, injuries, even the weather turning in the fourth quarter.
That is the whole appeal and the whole risk. A pregame line is a forecast. A live line is a forecast that keeps rewriting itself. When the Chiefs convert a 3rd-and-14 in the simulator above, their chance of winning goes up a few points, and the moneyline, spread and total all follow within a second or two.
On a big NFL or NBA night the live menu is often longer than the pregame one: the next drive, the next score, the current quarter, a player's second-half yards, and the three familiar markets quoted again and again.
Live odds come from trading models fed by official data feeds. The model turns the game state into a win probability, adds the book's margin and publishes a price. Human traders watch the biggest games and step in when the model misses something, like a quarterback jogging to the medical tent.
Even the fastest official feed arrives a moment after the play, and the stream on your couch is usually several seconds behind that. Books protect themselves against bettors with a faster picture by using a bet delay. You tap the price, a short countdown runs, and the wager is accepted only if nothing important happened in the meantime. If something did, the bet comes back rejected, or with a new price for you to confirm.
02the mechanics
Live odds move when the win probability behind them moves. That happens for three reasons: a score, news the data feed cannot see, and the clock running down.
So how does live betting work at the level of a single price? Every in-play price is a probability in disguise. Strip away the American odds format and the margin, and what is left is a single number: how likely the model thinks each outcome is right now. Each of the three moments below comes from one snapshot of a game, with the price before and after.
The three behave differently. A score is sudden and obvious. New information can be sudden and invisible. The clock is slow and relentless, and it keeps working against the trailing team during a quiet drive.
The size of a move also depends on how much game is left. A first-quarter touchdown shifts a moneyline modestly; the same touchdown with four minutes to play can flip the favorite.
A touchdown is the cleanest move in sports betting. Win probability jumps in one step, so the moneyline lurches instead of drifting, and books suspend the market while the extra point is attempted.
Chiefs ML +115 -160Total 51.5 55.5
Some of the biggest moves happen when nothing is happening on the field. A starting quarterback walks to the locker room, a pitcher's velocity drops three miles per hour, a tennis player calls the trainer. The model has no data point for that, so traders adjust by hand, and the market can stay suspended until they are confident.
Bills ML -210 -125Bills -3.5 -110 +120
When nothing changes on the scoreboard, time itself moves the price. A three-point lead with ten minutes left is fragile. The same lead with ninety seconds left and the opponent out of timeouts is close to safe. Each kneel-down shortens the leader's odds and pushes the total under, even on a run for no gain.
Leader ML -180 -650Under 44.5 -110 -240
03method
The simulator is a teaching model that replays seeded drives. It turns a win probability into prices with a built-in margin, pauses the markets after every play and offers a cash-out 6% below fair value.
The third-quarter drive is the same twelve plays in the same order every time, and each of the three live moments loads a shorter drive of its own, so every move is repeatable and you can pause on any of them.
Each play carries a game state (score, clock, possession, field position) and a win probability for the Chiefs. That probability is the only input the pricing step needs. The moneyline converts it to American odds and adds about 2.2 percentage points to each side, which is why the two sides never add up to exactly 100%. The spread sits where the model sees an even contest, rounded to the half point, and is priced around it. The total is the points already scored plus an expected-scoring rate for the time left, nudged up when the team with the ball is close to the end zone.
Every play pauses the three markets for a moment, which is what the three steps under the headline trace. Big plays hold the suspension for about a second and a half, a play under review longer still, standing in for the bet delay and trader review a real book applies.
The cash-out offer is the ticket's value at the current probability minus a 6% haircut, a round number chosen to show the shape of a cash-out; real offers vary by book, sport and market. Fair value is the potential return multiplied by your side's current win probability. The hedge stake uses the live moneyline on the other side, margin included.
The model knows nothing about injuries, weather or the volume of bets coming in, and real prices respond to money as well as to the game.
04side by side
A pregame price is a forecast made before kickoff. A live price is rebuilt from the game state after every event. Live markets usually carry a wider margin and leave you seconds to decide.
| Factor | Live | Pregame |
|---|---|---|
| Price basis | Current game state, updated after every event | Forecast built from matchups, injuries and money |
| Margin | Usually wider than pregame, and it varies by book and market | Tighter on main lines, around 4.5% at -110 / -110 |
| Speed | Seconds; bet delay and rejections are normal | Hours or days to compare and decide |
| Information edge | Watching the game can tell you more than the box score | Research before the market sharpens |
| Main risk | Impulse bets and chasing losses mid-game | Late news, such as a scratch, after you bet |
| Best tool | Cash-out and hedge math, a budget set in advance | Line shopping and a no-vig comparison |
Neither format is better. Pregame rewards research done before kickoff; live rewards attention and discipline during the game.
The margin row deserves a second look. A wider margin means you need to be right more often just to break even, and live markets carry more of it because the book takes on more risk when prices change every few seconds. That does not make every live bet poor value, but an in-play bet needs a clearer reason than a pregame one.
05the menu
Almost every live market is one of seven types. They differ in how long they stay open and how hard a single play moves them, which matters more for your budget than the price itself.
The live menu looks endless, but it sorts neatly by time. Full-game lines stay open for hours and react to every play by a little. Period lines and props narrow the window to a quarter or a half. Drive and next-score markets last a few minutes, and micro markets settle in seconds.
The shorter the window, the more bets fit into one game. Ten micro bets at $10 each risk the same as one $100 moneyline, with ten margins paid instead of one.
The same three markets you know from pregame, quoted again throughout the game. The spread and total lines themselves shift, along with the price, so a total that opened at 47.5 can sit at 55.5 by the third quarter.
Chiefs -1.5 (-115) · Over 55.5 (-105)
Who scores next and how: touchdown, field goal or no score before halftime.
Bills TD next +190
Punt, turnover, field goal or touchdown on the current possession.
Drive ends in TD +240
Winner or total of a single quarter, half, inning or period.
Q4 total 10.5
Yards, points, strikeouts or shots from here to the final whistle.
2H rush yds 38.5
Very short bets on the next pitch, the next play or the next point. They settle in seconds, which makes them the fastest way to lose track of a budget.
Next pitch: ball +105 · strike -125
Live legs from one game or several, combined. Prices correlate, so books restrict many same-game combinations once the game starts.
Chiefs ML + Under 55.5
06getting out
Both turn an open bet into a known result before the game ends. Cash-out sells your ticket back to the book; a hedge is a second bet on the other side. The live price decides which one locks in more.
The cash-out offer is your ticket's fair value at the current price, minus a margin. On a Chiefs ticket in the simulator it rises after the touchdown and the interception, and always sits below the fair value next to it. That gap is the price of certainty.
A hedge costs you the margin on the second bet, while cash-out bakes in a margin of its own, and the two are rarely identical. If the other side is available at a good price, a hedge often locks in more than the cash-out offer. If it is not, or the market is suspended, the button is quicker. The check below takes the offer from your app and the live price on the other side, and shows which one leaves you with more.
Many books let you cash out part of a ticket and leave the rest running. It works like a full cash-out on a smaller stake: you take a known amount now and keep some exposure to the original outcome. It suits the moment when you still like the bet but its size no longer fits your budget.
If you still think the original bet was good value, locking in a smaller profit has a cost. Cash-out and hedging manage risk you no longer want, such as a bankroll limit or a changed read on the game, and both pay the book a little for doing it.
07tempo
Each sport reprices on its own rhythm. Football moves in steps after every snap, basketball in constant small ticks, baseball pitch by pitch, hockey and soccer in long quiet stretches broken by goals, tennis point by point.
The rhythm decides how live prices behave. Sports that stop after every play reprice in neat steps and give the book a natural pause. Sports that flow continuously drift with the clock and jump on the rare decisive event. The lines beside each sport below sketch that shape over a full game.
Rhythm also shapes the menu. Football and basketball carry the deepest live markets; hockey and soccer lean on the next goal and the three-way result.
About 130 to 150 plays a game, each followed by a stoppage, which gives books a natural pause to reprice. The most volatile moments are fourth downs, red-zone trips and the two-minute warning. The spread moves in half-point steps through key numbers like 3 and 7.
step-and-hold
Around 200 possessions a game means constant small moves and frequent runs. A 10-0 stretch can swing a moneyline hard, yet basketball comebacks are common, so leads are priced as less safe than in football. Totals move fastest when the pace changes.
constant jitter
Pitch-by-pitch markets make baseball the natural home of micro betting. The base-out state, such as runners on second and third with one out, carries most of the price, and a pitching change can reset a game's total in the middle of an inning.
tiny ticks, sudden jumps
Goals are rare, so a single one moves the price more than almost anything in other sports. Power plays and empty-net situations late in the third period are the windows to watch, and the puck line at 1.5 behaves very differently in the last five minutes.
long flats, big cliffs
With no stoppages for most of the match, soccer prices drift with time and jump on goals and red cards. The draw shortens steadily in a level game, and the three-way moneyline is the market to understand before betting anything else.
slow drift
Point-by-point scoring creates a steady rhythm, with the biggest swings on break points and tiebreaks. Serve strength matters: a break against a big server moves the set price far more than a break in a match between two strong returners.
rhythmic swings
08discipline
No habit removes the margin, and nothing here guarantees a profit. Six habits do prevent the most common and most expensive live-betting mistakes.
Live markets are built to keep offering one more price. A live bettor can make a few dozen decisions in a single game, each under a countdown and each carrying a margin, and most of the damage comes from that volume.
The habits below work because they are set before the game, when nothing is moving. Writing down each live bet, with the price and the reason, shows within a few weeks which bets you actually handle well.
The full live betting strategy guide, with in-play tips and when to cash out
Decide the most you will spend on live bets for the game and stop when it is gone, whatever the next price looks like.
The opening line is your anchor. If a 3-point favorite falls behind early, the live price shows how much the market thinks the early score matters. Compare, then decide.
Any edge comes from seeing things the data feed reflects slowly: a limp, a tired pass rush, a pitcher losing his command. Betting a game you are not watching gives that up.
A rejected bet during a big play is the system working. Re-entering at a worse price because you were refused is how a plan turns into chasing.
Compare the offer with a hedge at the current price on the other side. The check takes ten seconds and often shows a better locked result.
A bigger bet on the next drive to win back the last one is the most expensive habit in live betting. Close the app and watch the rest of the game.
09where you are
Live betting is legal wherever state-licensed sports betting is legal and the regulator allows in-play markets. In practice that covers every state with legal mobile betting.
Illustrative map · Status as of
A simplified view, not legal advice. Laws change; confirm with your state's gaming regulator before you bet.
Since the federal ban on state-licensed sports betting was struck down in 2018, each state writes its own rules. Most states that legalized mobile betting allow live markets on the same apps, but three details vary: whether you can bet on college teams from your own state, whether college player props are allowed at all, and the minimum age.
Legal apps check your location every time you bet. A bettor who crosses a state line during the second half may find the live menu gone until they cross back, and a visitor from a state without legal betting can bet live while physically inside a state that has it. Each state guide on this site lists the regulator, the minimum age and the in-play rules.
In states where betting is limited to casinos or tribal venues, live betting usually happens at a kiosk or on an app that only works on the property. The markets look similar, but the menu tends to be shorter.
See every state, with in-play rules and college restrictions
10tools
Eight calculators cover the math of in-play betting, all in American odds. The hedge calculator works on this page; the other seven open on their own pages with a worked example.
8tools, one question each, nothing to install
Live decisions come with a countdown, so the math has to be ready first. Each tool page is a short guide of its own, with the formula and a worked example. Holding a ticket and wondering whether to get out? The hedge and cash-out calculators answer that. Unsure what a live price implies? Implied probability turns it into a percentage, and the no-vig calculator strips out the margin.
The odds calculator and converter handle a single bet in any format, the parlay calculator multiplies legs, and the arbitrage calculator checks whether two prices cover every outcome. Live arbitrage windows are rare and close fast.
11quick answers
Short answers to the questions that come up most about in-play prices, cash-out, bet delay and where live betting is allowed.
Yes. Live betting, in-play betting and in-game betting all describe wagers placed after the event has started. US sportsbooks tend to say "live", while international books often say "in-play".
Most rejections happen because the price changed during the bet delay, or because the market was suspended for a big play. Some books offer a setting that accepts price changes automatically. Leaving it off protects you from a worse number than the one you chose.
Live prices come from models that recalculate win probability after every event: a snap, a pitch, a point. Each new probability becomes a new price within a second or two, so in a busy game the numbers update constantly.
It is based on the current live price minus a margin, so it is almost always a little below your ticket's fair value. Compare it with a hedge on the other side before you accept it.
Cash-out closes your ticket with the same book for a fixed amount. A hedge leaves the ticket open and adds a second bet on the opposite side, sized so both results pay about the same. The hedge can lock in more when the other side is priced well, and it needs the market to be open.
In most legal states, yes. Some states restrict betting on in-state college teams or ban college player props entirely. The state pages list the specific rules where you are.
Yes. Legal US sportsbook apps use geolocation to confirm you are physically inside a state where they are licensed. Your home address does not matter; where your phone is when you bet does.
Bet delay is a short pause, typically between one and eight seconds, between submitting a live bet and the book accepting it. It stops people with a faster feed from betting on plays that have already happened.
Streams and broadcasts are usually several seconds behind the official data feed that books price from. By the time you see a play, the market may already be suspended or repriced, which is why prices sometimes move before anything happens on your screen.
Usually, with limits. Books restrict combinations whose legs are closely linked, such as a team's moneyline with that team's quarterback passing over his yards line, because the outcomes move together and the combined price would be too generous.
Often, yes. A standard -110 / -110 pregame line carries about 4.5%, while live two-way markets commonly carry more, because prices change quickly and the book takes on extra risk. The no-vig calculator shows the margin on any pair of prices.
21 in most states with legal sports betting. A few states set the age at 18 for some or all forms of betting, so check the rules in the state where you are.
Call or text 1-800-GAMBLER for free, confidential help around the clock. Legal US books also offer deposit limits, time-outs and self-exclusion in the account settings.
