Today's Value Accas.
Accumulators where our calibrated model rates the true chance higher than the bookmaker's price implies — one pick per match, combined honestly. Model probability vs market‑implied probability, with the edge shown. Free, refreshed through the day.
How an Acca Multiplies Edge — And Risk
An accumulator's true probability is the product of its legs (when they're independent): P(acca) = P(leg 1) × P(leg 2) × …
That multiplication cuts both ways. Genuine edges compound — but so do the bookmaker's margins and the variance. Three 60% legs give the acca roughly a 22% chance: a fair-priced treble loses more than three times in four. That's why every acca here is short, why each leg must clear the value bar on its own, and why the combined model probability and edge are shown next to the price.
One pick per match keeps the multiplication honest — same-match selections are correlated, and multiplying correlated probabilities overstates the real chance. For same-match combinations, the Bet Builder models that correlation explicitly.
How These Accas Are Built
TACTIX's model estimates a probability for every outcome it prices, grades each prediction with a result publicly, and publishes its calibration record live (6M+ settled, mean calibration error ±0.1%; all markets, player markets included). Selections qualify for an acca only when the model's probability beats the market-implied probability; qualifying legs are then combined across different matches and re-checked as prices move through the day.
Some days that produces several accas, some days none. An empty page is the system working — the alternative is padding combinations that don't clear the bar. See the full methodology and the singles value board.
Track These in Your Own Bankroll.
Create a free account to one‑tap track any acca, then watch your P&L, ROI and bankroll curve — with the model's edge measured against your real results.
Frequently Asked Questions
What is a value acca?
A value acca is an accumulator built only from selections where the model's probability is higher than the probability implied by the bookmaker's price. Instead of stacking favourites or long shots for their own sake, each leg has to look mispriced on its own before it is combined.
How is the edge on an accumulator calculated?
On this page, edge = model probability × decimal odds − 1 for the combined acca — the model's expected value per £1 staked. (The Today's Value singles board uses the same expected-value definition. It is positive exactly when the model's probability beats the probability the price implies.) For an acca, the combined model probability is the product of the leg probabilities, which is why edges and risks both compound.
Why is there one pick per match?
Selections from the same match can be strongly correlated — a team winning and the same team scoring over 1.5 goals are not independent events. Multiplying correlated probabilities overstates the true chance. Building accas with at most one pick per match keeps the multiplication honest. For same-match combinations, TACTIX's Bet Builder models the correlation explicitly.
Are longer accas better value?
Usually the opposite. Every extra leg multiplies the bookmaker's margin as well as the model's edge, and the hit rate falls multiplicatively — a five-fold of 60% legs wins less than 8% of the time even when every leg is fairly priced. Value accas here stay deliberately short; if no combination clears the bar on a given day, the page shows fewer accas rather than padding.
Why are there no accas showing right now?
Two honest reasons: either no upcoming fixtures produce enough positive-edge selections to combine (common in the off-season and midweek lulls), or the model and the market currently agree. An empty page means the bar wasn't met — TACTIX doesn't manufacture combinations to fill space.
Can I track how these accas perform?
Yes. With a free account you can one-tap track any acca into the Acca Tracker and watch profit and loss, ROI and your bankroll curve over time — the model's edge measured against real results, including the losing runs. The model's own record is on the public scoreboard.