In-play markets move every few seconds, cost more to bet, and are the only place a slow human ever gets a genuinely stale price.
In-play markets move every few seconds, cost more to bet than pre-game prices, and are the only place a person watching a game ever gets a genuinely stale number. All three of those are worth understanding before betting one.
A model takes the current game state — score, time, possession, who is on the field — and computes a win probability, then a trader's fee goes on top. It runs continuously and reprices after every meaningful event.
Nobody is setting these by hand. The prices are model output, which means their weaknesses are the model's weaknesses: unusual game states, injuries mid-game, and anything the feed does not know about.
You are betting against a model with a data feed, not against a person. The question is only whether you know something the feed has not yet delivered.
| Cost | What it is | Size |
|---|---|---|
| A larger hold | The fee on in-play markets | Often double the pre-game fee |
| The betting delay | A few seconds between clicking and acceptance | Long enough for the price to change |
| Feed latency | Your stream is behind the book's data | Broadcast delay can be 10-30 seconds |
A television or streaming feed lags the venue by many seconds. If you are betting on what you just saw happen, the market saw it first and has already moved. Reacting to a play on a stream is close to the worst possible reason to place a live bet.
Note that both of these are decisions made before the moment, not during it. Live betting rewards a plan and punishes reflexes.
Cash out is a book's offer to settle an open bet early. It is convenient and it is expensive: the price includes a large fee, and it is almost always worse than hedging the same position yourself in the live market.
The way to check is to compute what a hedge would return and compare. If the cash-out figure is lower — it usually is — you are paying for the convenience of one button.
Live betting removes every natural pause from gambling. There is always another market, and it is always about to resolve. Whatever limits you set for yourself apply here more than anywhere else on a board.
Live scores and game state, which is what an in-play price is reacting to. Follow a live slate.