In-Running Betting on Betfair — How to Trade During a Race

In-Running Markets: How They Work

Betfair Exchange's in-running horse racing markets remain open — accepting backs and lays — from the moment the race starts until the winner passes the post. Prices update in real time as the race develops: a horse that leads going into the final furlong may have its price cut from 4.0 (3/1) to 1.10 (1/10) in a matter of seconds; a horse that stumbles or loses its position may drift from 2.5 (6/4) to 20.0 (19/1). This price volatility creates trading opportunities — but also significant risk for unprepared participants. The volume of money matched in-running on a major UK horse race typically exceeds the pre-race matched total within the final 30 seconds of the race.

Types of In-Running Trades

The most common in-running trade types: (1) Laying the leader — if a horse leads clearly but is known to be prone to stopping (a confirmed front-runner who typically gets caught in the final furlong), laying it in-running when it shortens to a very short price in the final two furlongs. (2) Backing a horse that has made a mistake — horses that stumble over a fence or hurdle in jump racing will dramatically lengthen in price; if the horse appears unharmed and resumes, backing at the deflated price can represent value. (3) Trading out of a pre-race position — having backed a horse ante-post, laying it in-running at a shorter price to guarantee a profit regardless of the result ('greening up'). (4) Scalping — taking very small price differentials between back and lay prices in fast-moving markets, requiring specialist software and very fast connectivity.

Technical Requirements

Profitable in-running trading on Betfair is heavily dependent on the speed and quality of your data connection and the tools you use. Key technical considerations: Exchange latency — there is a deliberate 3-second delay on Betfair Exchange in-running markets to prevent abuse from participants with a live TV feed; a Betfair API connection with no delay requires a specific API licence. Software: most serious in-running traders use specialist software (Bet Angel, Geeks Toy, Gruss Betting Assistant) that provides real-time price ladders, one-click betting, and automated greening capabilities that are impossible to replicate with the standard Betfair web interface. TV delays: standard UK terrestrial TV (Sky Sports Racing, ITV Racing) has a 3-5 second delay from the racecourse — placing in-running bets while watching standard TV means your information is materially behind real-time racecourse data.

In-Running in Jump Racing vs Flat Racing

In-running trading characteristics differ significantly between flat and jump racing. Flat racing: prices move extremely fast — a 6-furlong sprint on the flat is over in approximately 65 seconds, with major price movements in the final 15 seconds. Trading flat racing requires very fast reaction times and is primarily the domain of experienced scalpers using API access. Jump racing: races last 4–8 minutes and produce larger, more sustained price movements as individual horses fall, are pulled up, or take commanding positions. A jump race leader at 1.20 three fences from home that subsequently falls creates a binary price movement that a fast trader can exploit. Jump racing's longer races are more amenable to analytical in-running trading; flat racing favours scalpers with technical advantages.