The Standard Market View
When you navigate to a Betfair Exchange market, the standard view shows each runner/selection in a list with two sets of prices: back prices (blue) and lay prices (pink). Each price button also shows the available amount at that price — the depth of money waiting to be matched.
The standard view shows three price levels on each side: the three best available back prices and the three best available lay prices for each selection. The innermost prices (closest to the spread) are the ones you'd get matched at immediately.
Back and Lay Columns Explained
The back column (blue) and lay column (pink) work in opposite directions from what you might expect:
- Back column (blue): Shows the best prices at which you can back a selection right now. The money shown is actually lay money that has been placed in the queue waiting for someone to back against it. Clicking a back price matches you against this existing lay money.
- Lay column (pink): Shows the best prices at which you can lay a selection right now. This is actually back money that has been placed in the queue waiting for someone to lay against it. Clicking a lay price matches you against this existing back money.
This can be confusing initially. The key insight: the displayed price is the price you will be matched at, and the amount shown is the opposite side's money waiting for you. The best back price is always lower than the best lay price — the difference between them is the spread.
The Spread
The spread is the difference between the best available back price and the best available lay price. In the ladder above, the spread is 3.65 (best lay) − 3.70 (best back) = −0.05, which is 1 tick at this price range. In active markets with deep liquidity, the spread is typically 1 tick. In illiquid markets it can be 3–10 ticks or more.
The spread is effectively a transaction cost for anyone who both backs and lays in the same market (i.e., any trader). If you back at 3.70 and immediately lay at 3.65, you've lost 1 tick before any market movement. You need the price to move in your favour by at least 2 ticks to profit after the spread. This is why trading requires price movement — not just being right about direction.
The Trading Ladder
The trading ladder is the essential interface for active traders. It shows all price levels for a single selection in a vertical column, with back amounts on the left, prices in the middle, and lay amounts on the right. It's similar to an order book in financial markets.
On the standard Betfair website, there is no ladder view — only the simplified back/lay buttons. The trading ladder is only available through third-party software (Bet Angel, Geeks Toy, etc.).
What the ladder shows that the standard view doesn't:
- All price levels simultaneously, not just the top 3 on each side
- The volume queued at every price point
- Your own pending (unmatched) orders highlighted in the queue
- One-click back or lay at any price by clicking that price level
- Real-time updates every 50–200 milliseconds via the API (versus 1 second on the website)
- Traded volume at each price level (showing where matching has occurred)
For any meaningful trading activity, software with a ladder interface is mandatory. See best trading software 2026 for the options.
Weight of Money (WOM)
Weight of Money (WOM) analysis looks at the balance of unmatched back money versus unmatched lay money near the current price to predict which direction the price will move next.
The basic principle:
- More unmatched lay money than back money near the current price suggests backers are trying to get on at lower prices, which will pull the price down (shorten). A steaming move is likely.
- More unmatched back money than lay money suggests layers are trying to lay at higher prices, which will push the price up (drift). The selection may be about to drift.
Large lay-side money appearing at the best back price. For example: £20,000 available to lay at 3.70 when the back side only has £6,000 at 3.75. The imbalance suggests significant backing pressure about to drive the price down. Traders look to back ahead of the move.
Large back-side money appearing above the current best lay price. For example: £15,000 available to back at 4.00 when the current price is 3.70. Suggests backers think the price will drift further and are queuing for higher prices. May indicate layers are withdrawing from the market.
WOM Limitations
WOM is a useful signal but has significant limitations that beginners tend to overlook:
- Bots and spoofing: Professional traders and automated systems place and cancel large orders rapidly to create a false impression of money on one side. What looks like £30,000 of backing pressure can disappear in milliseconds.
- Lagged data on the website: The standard Betfair website updates every ~1 second. By the time you see a WOM signal and react, it's often gone. Real-time WOM analysis requires software with API data refreshing at 50–200ms.
- Context dependency: WOM signals mean different things depending on the time before race start, the market's typical behaviour, and what other information is available. A large block of lay money at 3.70 an hour before a race means something different from the same block appearing 2 minutes before the off.
Reading Price Movement
Price movement on the Exchange is driven by the balance of supply (lay money) and demand (back money) at each price level. When more money is trying to back a selection than to lay it, the price shortens (drops). When more money is trying to lay, the price drifts (rises).
Common price movement patterns:
- Steaming: Rapid shortening — a price falling quickly due to heavy backing. Often triggered by market intelligence, a late tip, or a large well-known punter taking a position. Once steam starts, it can accelerate quickly as other traders pile in. A selection that opens at 4.00 and steams to 2.80 in 20 minutes is a significant move.
- Drifting: Gradual or rapid lengthening — a price moving out. Can indicate negative market sentiment, scratching news, or simply a lack of backing interest. A drifter at 3.50 moving to 5.00 represents a substantial shift in market probability assessment.
- Price stabilisation: After major movement in either direction, prices often stabilise as early movers take profits and the market equilibrates. This stabilisation phase is often when scalpers are most active.
2:45pm, 45 minutes before the 3:30: Midnight Express is 4.50 with £120,000 matched. Weight of money slightly balanced, no strong signal. Price stable.
2:55pm: A large block of lay money appears at 4.40. Volume starts climbing fast. Price ticks down: 4.50 → 4.40 → 4.30 → 4.20 in 4 minutes. The horse is steaming. Market intelligence suggests something positive — possibly a positive gallop report or a noted trainer comment.
3:05pm: Price settles around 3.80 with £480,000 matched. The steam has run its course. Early backers who got on at 4.50 are now laying at 3.80 for a guaranteed profit regardless of the result.
3:25pm: With 5 minutes to race, market activity intensifies again. Price moves in tight 1-tick increments. Scalpers are trading rapidly. Final price 3.70.
Matched Volume and What It Means
Total matched volume is the amount of money that has already been matched in a market at any given time. It's shown prominently in the market header. Volume tells you:
- Liquidity depth: High matched volume = deep market = easy to fill and exit orders. A UK Group 1 race with £2M already matched 2 hours before the off is highly liquid. A minor hurdle race with £30,000 matched is thin.
- Market activity level: Volume growth rate indicates how actively a market is being traded. A market going from £200K to £600K in 10 minutes is extremely active — something is happening.
- Signal reliability: In high-volume markets, price movements are more meaningful — they reflect the aggregate view of many participants. In low-volume markets, a single large bet can move the price significantly without reflecting any genuine information.
In-Play Market Behaviour
When a market turns in-play (the race starts, the whistle blows), the dynamics change dramatically:
- Price movements become faster and more volatile — seconds, not minutes
- Available liquidity at each price level drops significantly as cautious traders withdraw
- The spread often widens temporarily until the market restabilises
- Automated bots play a much larger role — the fastest participants dominate in-play
- Information delays become critical: a horse falling 200 metres from the finish creates a price movement before most manual traders can react
In-play trading requires software with a stable, fast API connection and typically some level of automation for exits. The standard Betfair website is completely unsuitable for active in-play trading — its 1-second delay is several lifetimes in a fast in-play market.
Why You Need Software to Trade
The standard Betfair website provides:
- Price updates approximately every 1 second
- No trading ladder view
- No one-click betting (requires multiple clicks per trade)
- No real-time P&L tracking across trades in a market
- No WOM visualisation tools
Third-party trading software connected via the Betfair API provides:
- Price updates every 50–200 milliseconds
- Full trading ladder with one-click back/lay
- Real-time P&L per market and per session
- WOM display tools and configurable alerts
- Automated green-up and stop-loss functionality
For any active trading — especially scalping or in-play — software is mandatory, not optional. See best Betfair trading software 2026 for the full ranking, and Bet Angel review and Geeks Toy review for the two most popular options.