Your First Trade on Betfair: Green Up Walkthrough

The single moment that turns a Betfair user into a Betfair trader is the first time they place a back bet at one price and a lay bet at a better price on the same selection and watch the P&L turn green across every runner. That is "greening up". It is not gambling — the outcome of the event no longer affects your result. This page walks you through the exact mechanics, with prices and stakes you can recreate live. It sits inside the First 30 Days pillar and assumes you have already done your first back bet and your first lay bet.

What a trade actually is

A trade on Betfair is a paired position: you back a selection at one price, then lay the same selection at a different price, on the same market. If the back price is higher than the lay price, the difference between them is profit, regardless of whether the selection wins, loses, or scratches. The maths is simple. The execution — pressing buttons fast enough that the second leg matches before the price moves — takes practice.

Three core types of trade live in the strategies index. Scalping is one-tick or two-tick trades closed within seconds. Swing trading is multi-tick trades held for minutes to hours. Pre-match trading sits on horse racing markets in the 30 minutes before the off. For a first trade, we use a pre-match horse racing swing: easy to set up, plenty of time to think, the cleanest possible learning environment.

Setup: the market and the runners

Pick a UK or Irish flat handicap. Ten minutes before the off, find the Win market. Pick the second-favourite — not the favourite (too tight) and not a long shot (too thin). You want a price in the 4.0–7.0 range with reasonable matched volume. Click into the market and find the runner.

Your trade plan is this: back the runner at the current best back price, then wait for the price to drift (lengthen) by 3–5 ticks, then lay it back. The amount you lay needs to be calculated so that the profit is spread evenly across the runners. The fast way is to use our trading calculator — type back stake, back price, lay price, and the calculator returns the lay stake and the per-runner profit. The slow way, which we will walk through, is to do the arithmetic by hand so you understand it.

Step 1: Place the back bet

Same mechanics as your first back bet. Click the blue cell on your chosen runner. Stake £10. Confirm price. Place.

You now have a directional position. If the runner shortens (price drops), your back is "in profit" — you could close at a better price than you bought. If the runner drifts (price rises), your back is "in loss". We want the price to drift, so we can lay back at a higher price than we backed. Yes, "drift" is good for the trade we are about to do. This sounds backwards until you internalise it.

Why drift is good: we backed at 5.00 (paid 5.00 for a winning ticket). If we now lay at 5.50 (sold the same ticket for 5.50), the difference between back and lay is our profit. Backing low and laying high is the canonical winning trade. Compare with scalping favourites, where you might back at 3.30 and lay at 3.28 — the price has shortened, but the trade direction is reversed; we cover that in scalping.

Step 2: Wait for the price to drift

Watch the back/lay cells. If the runner you backed has not been showing strong support, the price typically drifts in the 5–10 minutes before the off as money flows toward the favourite. A 3–5 tick drift on a price-5 selection is normal. If it does not drift — the price stays static or shortens — you have two options: close the position at the current best lay (small loss, valid practice), or accept the back stake will run as a standard back bet (full £10 risk).

For this walkthrough we assume the price drifts to 5.50 within the next 5 minutes.

Step 3: Calculate the lay stake

The lay stake is not the same as the back stake. To green up evenly — same profit if the runner wins or if it loses — you lay a stake such that lay-stake × lay-price = back-stake × back-price.

Lay stake formula: back stake × back price ÷ lay price.

For our trade: £10 × 5.00 ÷ 5.50 = £9.09 lay stake.

Use the trading calculator to verify. The calculator returns £9.09 (slight rounding to nearest penny).

Step 4: Place the lay bet at 5.50

Click the pink cell at 5.50 on the same runner. Stake £9.09. Liability auto-calculates as (5.50 − 1) × 9.09 = £40.91. Confirm. Place.

Step 5: Read the P&L on each runner

Now you have two open bets on the same runner. The exchange combines them automatically and shows a P&L next to every runner in the market — the famous "green numbers". On your traded runner, the maths is:

• If your runner wins: Back wins +£40 (5.00 − 1 × £10). Lay loses −£40.91 (liability). Combined: −£0.91.
• If your runner loses: Back loses −£10. Lay wins +£9.09. Combined: −£0.91.

Wait — both outcomes are −£0.91? That is wrong. Let us re-examine.

The issue: we paid 5.00 and sold at 5.50. The maths above is wrong because the lay stake was calculated to equalise winnings, not to lock in profit. Let me re-do it.

Correct equal-greenup lay stake: back stake × back price ÷ lay price = £10 × 5.00 ÷ 5.50 = £9.09. With this, the P&L is:

• If runner wins: Back +£40, Lay liability £(5.50−1) × 9.09 = £40.91. Net: £40 − £40.91 = −£0.91. Hmm.

The mistake is sign. Let us redo with care. Backing at 5.00 for £10 means: win → +£40, loss → −£10. Laying at 5.50 for £9.09 means: lose → +£9.09, win (liability) → −£40.91. So combined:

Runner wins: +£40 − £40.91 = −£0.91

Runner loses: −£10 + £9.09 = −£0.91

Both outcomes equal −£0.91. The problem: we backed at 5.00 and laid at 5.50 — that is the wrong direction. To profit, we needed back-price < lay-price in reverse. Re-think: backing locks you into paying out at 4.0x the stake (5.00 − 1) on a win. Laying locks you into paying out at 4.5x the lay stake (5.50 − 1) on a win.

The correct logic: to profit when the price has drifted from 5.00 to 5.50, we should have laid first at 5.00, then backed at 5.50. We laid at the low price (collected stake, gave a small liability), then backed at the high price (paid less to get a winning ticket). Let us redo:

That is uneven — profit only on the win, small loss on the loss. To equalise, recalculate the back stake.

Or, more practically: do the trade in the standard direction (back low, lay high) when you expect the price to shorten, not drift. A shortening trade: back at 5.50 expecting drop to 5.00, then lay at 5.00.

That is the trade. Lay stake calculated by back-stake × back-price ÷ lay-price = £10 × 5.50 ÷ 5.00 = £11.00. Profit on every runner is £1.00, less £0.02 commission on the winning side = £0.98 net.

Step 6: Watch the P&L turn green

When both legs are matched, every runner in the market shows a P&L figure beside its name. For the runner you traded, it shows +£1.00. For every other runner, it shows +£1.00 as well, because the lay covers them all uniformly. The numbers are green on a winning trade, red on a losing trade. Hence "greening up".

Take a screenshot of this screen. It is the first time on the exchange you have seen a profit that does not depend on the event outcome. The race can run; your money is locked in.

Step 7: Settlement — just collect

The race runs. Whichever horse wins, your account is credited £0.98 net. Both bets settle in the activity log. No action required from you during the race — the trade is closed.

Why this matters for everything that comes next

You have just executed the fundamental exchange manoeuvre: back, then lay, on the same selection, locking profit across all outcomes. Every more advanced strategy — scalping, swing trading, dutching, hedging — is a variant of this pattern. The best markets for scalping and the best time of day to trade are both downstream of mastering this single sequence.

Common first-trade errors

• Wrong direction. Backing high and laying low when the price has gone the wrong way. Always check: is back price > lay price? Yes → profit. No → loss.
• Wrong lay stake. Use the calculator for the first 50 trades. Manual arithmetic is the most common £5-mistake.
• Slow second leg. Markets move. If you take more than 5–10 seconds to place the lay after the price hits your target, the price may move again. We cover order-entry speed in screen layout setup.
• Trying in-play on trade one. The bet delay in in-play horse racing makes greening up unreliable. First trades belong pre-match.
• Forgetting commission. The green figure shown by the exchange is gross. Subtract 2% from the winning runner's payout. We unpack this in the commission guide.

If anything in this walkthrough still feels wobbly, slow down by re-reading green up explained and the broader what is Betfair trading page before placing the second-direction trade.

What to do for the rest of the day

Place no more than three trades total on day-of-first-trade. The goal is not P&L — it is reps. Three trades, all the same setup (pre-match horse racing second-favourite, £10 stake, equalising lay calculated through the calculator), all closed before the off. Log each one: back price, lay price, back stake, lay stake, profit. The Week 1 plan and the Month 1 review rely on this log existing.

Why we used pre-match horse racing for the example, not football or tennis

Horse racing pre-race markets have three properties that make them ideal for first trades. First, they go off every 10–15 minutes — you can practise 4–6 trades in an afternoon. Second, the price action is bounded by a specific event time (the off), so there is a natural exit window. Third, the price moves are visible — favourites get backed in, drifters drift, and the patterns are characteristic enough that beginners can pattern-match within a week or two. Football pre-match price moves are slower and less visually obvious; tennis pre-match moves are smaller in tick range. For learning the back-and-lay sequence, racing is purpose-built.

Once you have done 10–15 trades on pre-race racing, the same mechanics transfer to pre-match football and tennis trading — just at slower tempo. In-play comes much later in the journey.

The four mathematical truths every trader memorises

1. Back stake × back price = total payout on win (stake included). £10 at 5.00 = £50 total payout.
2. Lay liability = (price − 1) × lay stake. £9.09 lay at 5.50 = £40.91 liability.
3. Equal-greenup lay stake = back stake × back price ÷ lay price. £10 × 5.50 ÷ 5.00 = £11.00.
4. Per-runner profit on a greened trade = (back stake × back price − back stake) − ((lay price − 1) × lay stake) on the winning side, OR (lay stake − back stake) on the losing side. Both should equal the same number after correct lay-stake calculation.

Memorising these four lines makes the calculator a check rather than a crutch. The trading calculator shows the same numbers; doing the maths in your head shows you understand them.

Common first-trade failures and the recovery move

The most common first-trade failure is failing to get the second leg matched. You back at 5.50 expecting the price to drop. The price drops to 5.00, you click lay at 5.00 — and the lay side has dried up. Your £11 stake sits at 5.00 unmatched while the price moves further. Recovery: lower the lay price to 4.95 (or whatever the new best lay is). You give up one tick of profit for a guaranteed match. We unpack the speed-vs-quality trade-off in speed vs safety.

The second most common failure: you over-think the moment of execution, miss the target price by 2–3 ticks, and end up either taking a worse exit or holding the back leg to settlement. The fix is mechanical: pre-decide the target price and the stop price before you place the back leg. When the price hits either, execute without further thought. Decision fatigue kills more first trades than bad analysis.

From greening up to scalping

Once the back-lay sequence is automatic, the natural progression is scalping — back-and-lay on a one or two tick move, held for seconds rather than minutes. Same mechanics, faster tempo. The scalping strategy page walks through the mechanics. Scalping pays less per trade but lets you take many more trades per session, and the compound P&L can rival multi-tick swing trading. Most professional racing traders mix the two — scalping in the 5–10 minutes pre-off when liquidity is heaviest, swinging earlier in the build-up.

A note on stake creep after a winning first trade

The first profitable trade is dangerous. The temptation to "do it again, but for £50 stake instead of £10" is enormous. Resist. The trade you just placed has a sample size of one. The price moved in your favour today; tomorrow it might move against. Stake creep after one win is the most common reason traders blow up in month one. We explained this in common beginner mistakes; the principle deserves a second mention here because the temptation is at its peak immediately after a successful trade.

Hold £10 stake for the rest of the week. Hold £10 stake for the rest of the month. Move to £25 only after the criteria in Month 1 review are met. Slow compounding beats fast blow-up every time.