Green Up on Betfair: How to Lock In Profit

What Is Greening Up?

Greening up is the act of placing a closing bet on an existing position so that your profit (or loss) is identical across every possible outcome of the market. Instead of holding a winning back bet that will pay £100 if the horse wins and lose £20 if it loses, you "green up" by placing a lay bet at a shorter price, distributing the profit so you'd win £40 whichever way the market settles.

It's the same logic as any hedging trade. The trader's term "green up" comes from the way Betfair's interface displays profit/loss numbers in green when positive — a "green screen" means you've locked in a profit on every selection in the market. Read the closely-related hedging guide for the full risk-management perspective.

Why "Green"?

Open the Betfair Exchange interface for any market and you'll see two numbers next to each runner: the projected profit if that runner wins, and the projected profit if that runner loses. Profit shows in green; loss shows in red.

Before you place any bets, both columns show 0. After a single back bet, the runner you backed shows green (potential profit) and every other selection shows red (potential loss). When you place an offsetting lay bet at the right stake, the figures rebalance — every selection turns green by the same amount. That's a fully-greened-up position.

The Green-Up Formula

To green up an open back bet, you place a lay at a shorter price using the formula:

If you laid first and want to green up by backing, the formula reverses:

The trading calculator does this maths for you in real time — input your original stake, original odds, and current price, and it tells you the hedge stake. Most traders use the calculator (or software-built-in green-up) rather than calculating manually.

Worked Examples

Partial vs Full Green-Up

Full green-up locks profit equally across all outcomes — the safest approach. Partial green-up locks some profit but leaves additional upside on a preferred outcome. It's a deliberate decision to take some risk in exchange for higher reward if the original view plays out.

"Free bet" green-up is a special case: you place exactly enough hedge to remove all loss exposure, leaving the original back bet's profit intact if the selection wins. Useful when running matched-betting style promotions — see our matched betting guide.

Automatic Green-Up in Software

Manual green-up calculations get tedious. Trading software automates it. The two leaders:

• Bet Angel: The "Hedge" button on the ladder calculates and submits the hedge order in one click. Pre-set commission rates ensure displayed profits reflect post-commission reality. See full Bet Angel review.
• Geeks Toy: Identical functionality with a different ladder layout. Many UK racing scalpers prefer Geeks Toy for raw execution speed.

Both apps will offer green-up at "current best price" or "best available across the market". The latter avoids paying the spread on small markets but introduces partial-fill risk in fast moves. For tight spreads in liquid markets, current best price is usually the right choice. See our 2026 software ranking for the full comparison.

When to Green Up Early

Green up early when:

• You hit your target: If the trade reached the price you planned for, take the profit. Don't squeeze.
• The market structure is changing: Big new orders entering the book, sudden volume spike, news incoming — close while you can.
• You're approaching event start: Pre-match traders should always exit before the off / kick-off. In-play volatility is a different game.
• You're nervous: If a position is keeping you up at night, the position is too big. Green up, reset stakes, retry tomorrow.
• Liquidity is degrading: If the back/lay spread widens, get out before it gets worse.

When to Hold

Holding (not greening up) is appropriate when:

• Your view is unchanged and the market hasn't reached fair value: If your model says the favourite should be 2.50 and it's still 2.10, hold the lay.
• You're trading a position deliberately, not scalping: See swing trading — those trades are designed to ride larger moves, not to green up at every wobble.
• The risk-reward ratio is still favourable: If you can win 30 ticks more for risking 5 ticks of locked profit, that's often worth it.
• You've used a trailing stop: A trailing stop locks in profit while leaving upside open — better than a hard green-up in trend-following situations.

Common Mistakes

Five mistakes that turn good trades into bad ones:

1. Calculating without commission: A "locked £20 profit" before commission becomes £19 (2% racing) or £18 (5% football/tennis). Always factor commission into your displayed P&L.
2. Greening up at the wrong price: Hovering on the lay side instead of the back side and clicking the wrong button is the most common live error. Software with one-click hedge buttons (Bet Angel, Geeks Toy) eliminates this.
3. Greening up too small a stake: Round-down errors leave residual liability. If the calculator says hedge £133.33 and you stake £130, you have unhedged exposure. Always round up to the next penny — the small extra cost is worth zero residual risk.
4. Greening up in illiquid markets: If your hedge order doesn't match in full, you're left with partial exposure. Avoid greening up in markets with <£100,000 matched.
5. Greening up too early on long-term positions: If you've planned a position trade designed to capture 50 ticks, taking 5 ticks because you're "ahead" violates the original plan. Stick to your plan.

Green-up is the foundation of every other trading skill on Betfair. Once you can calculate hedges quickly (or use software to do it), you have the closing skill needed for scalping, swing trading, pre-match trading, and in-play trading. Practise the calculation on every trade until it becomes automatic.