Compare morning line odds to actual tote odds. Identify overlays and underlays to find value in horse racing betting.
Overlays
2
Better value than ML
Underlays
1
Less value than ML
Best Overlay
#3
+50% vs ML
| Horse | ML | Current | ML Prob | Curr Prob | Change | Status |
|---|---|---|---|---|---|---|
| #3 | 3/1 | 5/1 | 25.0% | 16.7% | +50% | OVERLAY |
| #5 | 5/1 | 4/1 | 16.7% | 20.0% | -17% | UNDERLAY |
| #7 | 8/1 | 10/1 | 11.1% | 9.1% | +22% | OVERLAY |
Horse #3 is 50% higher than morning line. ML implied 25.0% win probability, but current odds suggest only 16.7%. If you believe the morning line is accurate, this is a value bet.
Quick-start with common scenarios
Morning line odds are set by the track handicapper before betting opens. Comparing them to actual tote odds reveals value plays. An "overlay" is when actual odds are higher than morning line (better value). An "underlay" means odds are lower (less value). Smart bettors look for overlays.
The morning line is odds set by the track's official handicapper before betting opens. It's an educated prediction of what the odds will be at post time. It helps bettors gauge early value and serves as a starting point for the betting pools.
An overlay occurs when a horse's actual odds are higher than the morning line. If the morning line is 3/1 but the horse is currently 5/1, that's an overlay. This suggests the public is under-betting the horse, potentially offering value.
An underlay is when actual odds are lower than morning line. If the morning line is 8/1 but the horse is 4/1, the public is betting more than the handicapper expected. This reduces value unless you believe the public sees something the handicapper missed.
Morning lines are surprisingly accurate on average, especially for favorites. The morning line favorite wins about 30% of races. However, individual handicappers vary, and morning lines are less accurate for longshots and large fields.
Not automatically. An overlay means better value IF you liked the horse at morning line odds. If a 10/1 morning line horse drifts to 20/1, it's an overlay, but the public might be right to avoid it. Use overlays as one factor in your handicapping.