The Weekly Edge — week of September 21, 2026
The scanner's week, measured: 89,533 detections across 788 markets, watching 4,215 confirmed cross-venue pairs. Every figure is net of all venue fees at order-book-fillable size.
The five biggest opportunities we measured
| Market | Net edge | Measured room |
|---|---|---|
| Philadelphia Phillies @ New York Mets (2026-09-19 20:11 UTC) | 15.00% | $375 at $2,500 |
| Atlanta Braves @ Chicago Cubs (2026-09-14 23:41 UTC) | 14.96% | $374 at $2,500 |
| Green Bay Packers @ New York Jets (2026-09-20 17:03 UTC) | 14.95% | $374 at $2,500 |
| New York Yankees @ Arizona Diamondbacks (2026-09-20 00:41 UT | 14.95% | $374 at $2,500 |
| Seattle Mariners @ Colorado Rockies (2026-09-19 00:11 UTC) | 14.95% | $374 at $2,500 |
Each was a live, fillable price difference when detected — the dashboard shows current ones in real time.
Cheapest sportsbooks this week (measured overround)
lowvig 3.67% · courtside 4.04% · betanysports 4.31% — full ranking of 20+ books — full table with per-market breakdowns on the venue comparison.
Why gaps like these exist
Two venues price the same outcome independently, and their user bases mostly can't trade both. The difference is measurable — that's what ArbMonster does all day. How it works.
ArbMonster is a data service. Nothing here is financial or betting advice; markets carry risk, venues have age and jurisdiction restrictions, and you are responsible for verifying everything before acting.