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Strategy & bankrollBeginner

Line Shopping in Practice

Holding three accounts and taking the best price every time — the only edge available to everyone.

Ellis HartnollHead of Testing6 July 20267 min readUpdated 6 July 2026
Line Shopping in Practice
Three accounts, one comparison, every bet. It is the whole method.

Every other edge in betting requires you to know something the market does not. Line shopping requires you to open three accounts and look at three numbers before each bet. It is dull, it works, and almost nobody does it consistently.

What it is worth

The price on Ashford City–Northvale United over 2.5 goals this week ranged from 1.72 to 1.83 across the eight bookmakers we checked — a 0.11 spread, about 6% of your return. On a £50 stake that is £5.50 of winnings you either collect or do not, decided entirely by which tab you had open. Across fifty bets a season the gap between always taking the best price and always taking an average one is roughly the size of a welcome offer, every season, with no wagering.

Which three accounts

  1. The sharpest. Kestrel in our guide — the lowest average margin, and the price to beat on any main market.
  2. The deepest. NovaBet or Marlin, for the markets the sharpest operator does not carry and the sports it does not cover.
  3. The specialist for what you bet. Stadion for in-play, Lanterna for tennis, Tallow for racing, Bramble for builders. The third account is the one that matches your habits.

Fund all three

A price you cannot take because the account is empty is not a price. Keep enough in each account for a few units, and move money when one runs low rather than settling for the second-best price.

Doing it every time

The failure mode is not ignorance, it is friction: three apps, three logins, thirty seconds. Switch every account to decimal odds so comparison is a glance, keep the three apps on one screen, and make the comparison the first step of every bet rather than an optional last one. Over a season the habit is worth more than any single pick you will ever make.

Key takeaways

  • Line shopping means comparing the price at several bookmakers and taking the best, every time.
  • Three well-chosen accounts capture most of the available improvement.
  • On a £50 bet the spread between best and worst price is often worth a pound or more in expectation.
  • It is the only edge that requires no forecasting skill whatsoever.
TagsLine shoppingMarginsOdds
Written byEllis HartnollHead of Testing · 17 guides published

Ellis has priced sports markets for two bookmakers and now runs Oddsmark’s testing programme, measuring margins across forty markets a month. He writes about pricing, market rules and the arithmetic bettors are rarely shown.

All work by Ellis Hartnoll

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Sharpest prices
Kestrel8.6

A 3.4% average football margin — the lowest of the fifteen bookmakers we measure each month.

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Responsible gambling

Understanding margins makes betting cheaper, not profitable. Set a deposit limit before you open an account, never chase losses, and treat every stake as spent the moment it is placed.