Primera A · Wednesday, 21 October 2026 · 02:30. Our rating makes this 43% to go over 2.5 goals, so our lean is under. The Primera A average is 45%.
Open this match in the app →| Market | Yes | No | Our call |
|---|---|---|---|
| Over 2.5 goals | 43% | 57% | Under |
| Over 3.5 goals | 22% | 78% | no pick |
| Both teams to score | 50% | 50% | Yes |
The result model puts Millonarios at 51%, the draw at 30% and Once Caldas at 19%, from expected goals of 1.29 and 0.65.
| Market | Price | Implied | Our rating | Edge |
|---|---|---|---|---|
| Over 2.5 goals | 1.85 | 51% | 43% | -8% |
| Under 2.5 goals | 1.95 | 49% | 57% | +8% |
| Both teams to score | 1.83 | 50% | 50% | +0% |
Implied percentages have the bookmaker's margin removed, so they add to 100 and can be compared with our rating directly. Edge is simply the gap between the two. A positive edge means our model thinks the outcome is likelier than the price suggests — it is not a tip, and a high probability with a negative edge is a poor bet however safe it looks. Prices are a pre-match snapshot from a single bookmaker and move constantly.
Match odds: Millonarios 1.67, draw 3.60, Once Caldas 4.75.
The league sets the starting point. Primera A has produced over 2.5 goals in 45% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. Millonarios have 17 in 34 this season (7 of 16 at home), Once Caldas 15 in 35 (6 of 18 away). Those records are pulled toward the league rate with the weight of about 24 matches — enough that two or three unusual games cannot swing a rating — giving 48% and 44%.
Last season still counts, briefly. With 34 and 35 games played this season, last season's rates are still blended in and fade out entirely by game 40 — the point at which our testing showed they stop adding accuracy. A single season is part luck, so each club's record is first pulled toward the league average by 34 games' weight. That moves the two figures to 47% and 44%.
The mix. Weighted 40% home side, 40% away side and 20% league — the split that beat every alternative across 30,582 matches of testing — that gives 46%.
Head to head. These sides have met 7 times in three years, producing over 2.5 goals in 43%. That nudges the number 5% of the way toward the head-to-head pattern — deliberately small, because fixtures change more than reputations do — landing on 45%.
Goal expectation. Separately a Poisson model built from attack and defence strength — using real expected-goals data where the league has it — puts this match at 31%, from expected goals of 1.29 for Millonarios and 0.65 for Once Caldas. Folding in 30% of that view gives 41%.
Calibration. Tested against 97,729 past matches, our ratings below 55% have run consistently too pessimistic — a figure in the high 30s, for instance, has come in about four points higher. So ratings in that range are lifted part-way back, giving 43%.
This breakdown is generated from the same inputs the rating uses, so it cannot describe a calculation we did not perform. The full model is set out in the methodology.
| Team | Games | O2.5 | O3.5 | BTTS |
|---|---|---|---|---|
| Millonarios | 34 | 50% | 26% | 62% |
| Once Caldas | 35 | 43% | 23% | 69% |
More: Millonarios season stats · Once Caldas season stats · Primera A table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.