Edge is the size of your advantage on a bet: how much better the odds are than the outcome's true probability warrants. An edge of 5% means that, per £100 staked, you expect £5 of profit in the long run. Edges in sports betting are small — professionals get excited about 2–5% — because betting markets are competitive and mostly efficient.
Claimed edges should be treated sceptically, including ours. The honest test of an edge is settlement over a large sample: if a method's graded record over hundreds of bets shows positive return, the edge is real; if not, it was noise. This is why we archive every tip before kick-off and publish the settled results, wins and losses alike.
Best available price 2.30 against a fair probability of 46%: edge = (0.46 × 2.30) − 1 = +5.8%. At flat £10 stakes over 500 such bets, expected profit is about £290 — with substantial swings along the way.