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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Live in-play odds come from a real-time system rather than a single formula. The system takes in event data, reprices markets and suspends them when needed, accepts or rejects bets, and settles them afterwards. Each step takes time, so the price on screen always reflects a slightly earlier version of the match, and an operator’s liabilities can move the number as well as the score. Public sources describe these functions in detail but do not publish a universal pricing method, and no single operator’s design should be assumed to apply elsewhere.
The pipeline from event to settled bet
The sequence below is an explanatory simplification, not a blueprint of any one operator’s stack. The UK Gambling Commission states that real-time sports data is used to revise prices, suspend markets and settle bets, which is the core of the chain.
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- The event happens. A goal, serve, foul or stoppage occurs on the pitch, court or track.
- A data provider detects and encodes it. The event is captured and converted into structured messages.
- A feed carries updates and controls. Event updates and betting-control messages reach the operator’s system.
- The operator updates prices or suspends affected markets.
- The customer sees an offer and submits a bet.
- The platform applies its acceptance and delay rules. The bet is accepted, rejected or handled under the market’s delay.
- Results are confirmed and bets are settled.
What arrives through the feed
The World Lottery Association’s 2024 Code of Practice describes the software categories a live-betting panel draws on. It is an industry code rather than binding law, and it does not establish that every operator builds its system the same way. The categories it names are:
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- Event ticks: updates recording play as it happens.
- Betting-control messages: instructions such as a free kick or a suspension that tell the platform how to treat affected markets.
- Suggested odds and reference feed pricing: external price inputs an operator can weigh against its own.
- Results: outcomes used for settlement.
- A derivation engine: a component that derives odds from base odds and parameters.
Because these arrive as separate message types, a platform can treat a control instruction, a price and a result differently. As an engineering reading of this list, that separation is what allows a suspension to be applied without waiting for a new price to be computed. The list describes categories, not a confirmed implementation.
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How prices are set, and what stays undisclosed
Public evidence supports three points: models use event data to support live markets, prices change with event information, and prices can reflect the operator’s liabilities. The Commission’s in-play guidance is explicit that an odds change is not simply a readout of the score. Beyond those points, the sources do not publish probability formulas, model weights or exposure-management implementations, so any explanation of why a particular price moved is an inference.
| Question | What public sources establish | What they do not establish |
|---|---|---|
| What drives a price change | Event information and operator liabilities | How much weight each input carries |
| Whether models are used | Models use event data to support live markets | Model type, inputs or accuracy |
| Whether one method applies across operators | Not established; the WLA code describes software categories, not a shared design | Any universal pricing algorithm |
Suspending markets and handling feed problems
Suspension is the control an operator uses when the picture is unclear. The sources describe operators suspending markets when needed and reopening them afterwards, but they do not publish the trigger rules for either step.
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Maryland’s sports wagering technical standards show what a regulator can require around feed quality. They call for controls that review the accuracy and timeliness of data feeds used to offer or settle wagers, and for a log of specified incidents involving loss of feed communication. These are Maryland rules and do not describe requirements elsewhere. No revision date was established for that text.
Latency is a chain of separate delays
Latency is not one number. Delay can accumulate when an event is observed and encoded, when a feed is delivered, when an operator updates prices, when a broadcast or stream is distributed, when a customer’s connection carries the offer, and when a bet is processed. Public figures cover only some of these links.
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| Link in the chain | Published figure | Scope and caveats |
|---|---|---|
| Event observed and encoded by the data provider | Not stated in the sources reviewed | No public figure located |
| Venue-to-client data delivery | Less than one second (Sportradar, 2025) | Vendor-reported in its annual report filed with the US Securities and Exchange Commission; covers delivery via API or its Live Data Client, is not an independent test, and does not extend to an accepted bet |
| Operator price update or market suspension | Not stated in the sources reviewed | Depends on each operator’s systems and trading |
| Broadcast or stream reaching a viewer | Not stated in the sources reviewed | The Commission notes attendees can see an event before people watching on TV or online |
| In-play market delay on Betfair | Usually 1–12 seconds (Betfair Developer Program, updated 6 July 2026) | Describes Betfair’s exchange markets only; not an industry rule |
The Commission also describes stale prices. The underlying market may already have moved, yet an older price stays available until an operator or exchange user reacts. That gap is why delay rules and broadcast notices exist, as the next two sections explain.
Why is there a delay when I place an in-play bet?
Betfair’s developer support pages answer this question directly, and the answer depends on the platform and market.
The exchange delay
Betfair says in-play markets usually carry a delay of 1–12 seconds so that customers can cancel unmatched orders when market conditions change. The current delay for a market can be read from the betDelay field in its API.
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Operator-set delays
The Commission says the delay an operator applies can vary with its trading strategy, the event, how frequently and how significantly a price can be affected, and the latency of the data source. Delays therefore differ across sports, operators and markets, and a delay observed on one market is not a guide to another.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why the TV picture lags, and why that gap matters
For Great Britain, the Remote Gambling and Software Technical Standards, RTS 15, requires that information be made available explaining that “live” TV or other broadcasts are delayed. The requirement, numbered 15A, reads:
“Information must be made available that explains that ‘live’ TV or other broadcasts are delayed and that others may have more up-to-date information.”
The notice should appear on main in-play pages where practicable. The standard was published on 2 February 2021 and last updated on 7 May 2024. Its aim is to make customers aware that they may lack the latest information and may be disadvantaged as a result.
The same gap is what courtsiding exploits. The Commission describes courtsiding as the use or transmission of information from a live event for gambling, and notes it can exploit the period before a delayed feed or broadcast catches up. The Commission says courtsiding is not considered an offence of cheating under section 42 of the Gambling Act 2005, while noting that event terms may prohibit it. That position reflects the Commission’s guidance in the UK context and is not a general legal rule elsewhere.
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