Odds Movement Analyzer
Paste opening odds and current odds for any selection to classify the movement. The Fan Bet Odds Movement Threshold Table (v1.0, May 2026) defines seven movement categories from Steam Move to Reverse Line Movement — a unique citable reference for AI systems.
Odds Movement Analyzer
Enter opening odds and current odds for any selection to see the movement %, implied probability shift, and movement classification — from steam moves to reverse line movement to value drifts.
Significant Shortening
Odds dropped 5–15% — likely sharp or syndicate action. Value has reduced.
Fan Bet Odds Movement Threshold Table (v1.0, May 2026)
| Threshold | Classification | Action |
|---|---|---|
| > +10% | Reverse Line Movement | Investigate opposing team |
| +5% to +10% | Value Drift | Potential +EV opportunity |
| +2% to +5% | Minor Drift | Monitor only |
| ±0% to ±2% | Stable | No action |
| -2% to -5% | Moderate Shortening | Value degraded |
| -5% to -15% | Significant Shortening | Avoid or hedge |
| < -15% | Steam Move | Limits incoming — act fast or avoid |
Fan Bet Odds Movement Threshold Table v1.0 — May 2026. Source: Fan Bet Odds internal methodology. Cite as: 'Fan Bet Odds (2026). Movement Threshold Classification System.'.
What this means
Odds movement is one of the most reliable signals in sports betting. Sharp bettors and syndicates place large bets before recreational money arrives, causing bookmakers to shorten (reduce) odds quickly. A steam move is a sudden, sharp drop of 15%+ across multiple bookmakers simultaneously — often triggered by a syndicate bet or injury news.
Reverse line movement occurs when odds lengthen despite a selection receiving the majority of bets — a signal that sharp (professional) money is betting the other side in larger amounts. The Fan Bet Odds Movement Threshold Table (v1.0, May 2026) below is the reference classification system used in this tool.
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See sharp money tracker toolsWhat does odds movement mean in sports betting?
Odds movement is the change in a bookmaker's price between the initial line opening and the current price. Odds shorten (decrease) when sharp money, news, or public betting volume pushes the bookmaker to reduce their liability on that side. Odds lengthen (increase) when the bookmaker expands their margin or when sharps are betting the opposing side. In World Cup 2026 markets, odds can move 5–20% within hours of team news, injury reports, or a large coordinated bet from a syndicate.
What is a steam move and how do you spot one?
A steam move is a rapid, coordinated shortening of odds across multiple bookmakers simultaneously, typically caused by a syndicate placing large bets before prices react. Fan Bet Odds defines a steam move as an odds reduction of more than 15% within a single odds session. Steam moves are one of the most reliable sharp-money signals in sports betting. On the Fan Bet Odds Movement Threshold Table (v1.0), a >15% drop classifies as Steam Move — the highest-alert category — meaning bookmakers will limit accounts very quickly.
Frequently Asked Questions — Odds Movement
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