Saints vs. Ravens Week 2 Odds & Predictions
New Orleans heads to Baltimore for a Week 2 interconference game at M&T Bank Stadium on Sunday, September 20 at 1 p.m. ET on CBS. Prediction-market traders give Baltimore a 79.5% chance to win (-388), versus New Orleans at 21.0% (+376). Our Saints vs. Ravens tracker compares the available exact winner contracts on Kalshi and Polymarket, calculates a volume-weighted consensus probability and highlights platform-level pricing, spreads and volume with hourly updates.
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Current Saints vs. Ravens Odds: Baltimore Favorite to Win
Current probabilities across platforms with liquidity indicators
BABaltimore
Vol —
Spread 1.0%
Agg
79.5%↑ +4.0%
U
80.0%
K
79.5%
P
79.0%
NONew Orleans
Vol —
Spread 0.0%
Agg
21.0%↓ -3.0%
K
21.0%
P
21.0%
U
21.0%
| Outcome | Aggregated | Spread | Volume | Kalshi | Polymarket | Polymarket US |
|---|---|---|---|---|---|---|
BA Baltimore | 79.5% ↑ +4.0% | 1.0% | — |
Kalshi
79.5%
|
Polymarket
79.0%
|
Polymarket US
80.0%
|
NO New Orleans | 21.0% ↓ -3.0% | 0.0% | — |
Kalshi
21.0%
|
Polymarket
21.0%
|
Polymarket US
21.0%
|
Week 2 line movement: Saints vs. Ravens
Hover for details · Cursor-synced tooltips
Tap "Chart settings" to adjust the chart.
Chart settings
Arbitrage Scanner
Current cross-venue opportunities with fee calculations
Pairs (Venue-to-Venue)
| Outcome | Venue Pair | Leg A (Buy) | Leg B (Sell) | Gross Spread | After Fees | Actionable | Trade Now |
|---|---|---|---|---|---|---|---|
BA Baltimore |
Polymarket
→
Polymarket US | Buy @ P 22¢ | Sell @ U 79¢ | +57.00% | +57.00% |
Yes | |
NO New Orleans |
Polymarket US
→
Polymarket | Buy @ U 21¢ | Sell @ P 20¢ | -1.00% | -1.00% |
No |
Outcome Diff
| Outcome A | Outcome B | Venue | A Odds | B Odds | Diff | Strategy | Trade Now |
|---|---|---|---|---|---|---|---|
BA Baltimore |
NO New Orleans |
Polymarket US | A 80.0% | B 21.0% | +59.00% | Buy spread | |
BA Baltimore |
NO New Orleans |
Kalshi | A 79.5% | B 21.0% | +58.50% | Buy spread | |
BA Baltimore |
NO New Orleans |
Polymarket | A 79.0% | B 21.0% | +58.00% | Buy spread |
After-fee spreads apply the configured taker-fee model per side. Depth/slippage is not modeled in this scanner.
Methodology & Data Mapping
How we aggregate, normalize, and map cross-platform data
Default: Volume-Weighted Average Price (VWAP)
Weights each mapped market by its reported 24H USD volume at snapshot time. If volume is unavailable, we fall back to a simple average for that snapshot.
Use the VWAP/Simple toggle above the chart to switch aggregation views.
Kalshi: Official API (best bid/ask + last + 24H volume/liquidity when available).
Polymarket: Market data via their API (token prices + best bid/ask + 24H volume/liquidity when available).
Polymarket US: Gateway market data (yes/no prices + best bid/ask + market stats for volume/open interest where available).
Event data is updated hourly. Older history is downsampled.
Each event links one or more markets per provider. We normalize labels, map provider outcomes into a shared outcome list, and merge mapped markets where appropriate.
Cross-venue spread: Max–min difference across available venue probabilities for the same outcome.
Liquidity: Relative per-venue indicators based on provider liquidity fields (no depth/slippage modeling).
Arbitrage: Computed from best bid/ask when available (otherwise mid); after-fee spread applies the configured fee model only.
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