One-Way vs Two-Way Markets
Not all props are created equal. The structure of the market—specifically, whether it is one-way or two-way—dramatically affects how you should approach it.
Understanding this distinction is one of the most important concepts in prop betting, yet most recreational bettors never learn it.
Two-Way Markets
These are the standard Over/Under props you see most often:
Jayson Tatum Total Points
• Over 26.5 (-110)
• Under 26.5 (-110)
Characteristics of Two-Way Markets
| Feature | Description |
|---|---|
| Both sides available | You can bet Over OR Under |
| Similar prices | Both sides priced near -110 |
| Better price discovery | Competition keeps lines accurate |
| More efficient | Sharp money corrects mistakes |
| Lower vig | Typically 4-7% total hold |
Tip
Two-way markets are generally more efficient because they have more liquidity, better price discovery, and more competition between sportsbooks. This is where you should focus most of your betting.
One-Way Markets
These are props where only one side is offered:
Travis Kelce Anytime Touchdown Scorer: Yes +110
(No "No" option listed)
Here, you can only bet "Yes"—there is no "No" option. Sportsbooks like DraftKings commonly structure anytime TD or home run props this way.
Warning
Critical Warning: True one-way markets are fundamentally different. When only one side is offered, the vig is hidden and typically much higher—often 20-40% or more. You cannot calculate the hold by comparing both sides because there is no other side to compare against.
Why One-Way Markets Are Dangerous
| Problem | Impact |
|---|---|
| Hidden vig | You can't see how much you're overpaying |
| No price comparison | Can't shop for better odds on the "No" side |
| Higher variance | Touchdown/HR props are inherently volatile |
| Recreational trap | Designed to attract casual bettors |
Juiced Two-Way Markets (The Middle Ground)
Sometimes you will see both sides listed, but one side is so heavily juiced it is practically unbettable:
First Touchdown Scorer: Patrick Mahomes
• Yes +350
• No -500
Technically this is a two-way market, but the "No" at -500 requires you to risk $500 to win $100. The vig is distributed extremely asymmetrically to discourage action on the "No" side.
How to Identify Juiced Two-Way Markets
Look for these warning signs:
- One side is +200 or higher
- The other side is -300 or worse
- The total implied probability exceeds 110%
Key Insight
When you see a "two-way" market with extreme asymmetry (like +350/-500), treat it like a one-way market. The "No" side exists only to create the illusion of a fair market.
Market Structure Comparison
| Market Type | Example | Typical Vig | Recommendation |
|---|---|---|---|
| Standard Two-Way | Over/Under 26.5 (-110/-110) | 4-5% | ✅ Primary focus |
| Slightly Juiced Two-Way | Over/Under (-120/-105) | 5-7% | ✅ Acceptable |
| Heavily Juiced Two-Way | Yes/No (+350/-500) | 15-25% | ⚠️ Be selective |
| True One-Way | Anytime TD Yes +110 | 20-40%+ | ❌ Generally avoid |
Calculating Vig in Two-Way Markets
For a standard two-way market, you can calculate the total vig:
Total Implied Probability
Implied Prob (Side A) + Implied Prob (Side B)=ABS(A2)/(ABS(A2)+100) + ABS(B2)/(ABS(B2)+100)Example: -110 / -110
- Over implied: 110/(110+100) = 52.38%
- Under implied: 110/(110+100) = 52.38%
- Total: 104.76%
- Vig: 4.76%
Example: +350 / -500
- Yes implied: 100/(350+100) = 22.22%
- No implied: 500/(500+100) = 83.33%
- Total: 105.55%
- Vig: 5.55% (but the structure makes "No" practically unbettable)
Strategic Implications
For Two-Way Markets
- Calculate implied probability for both sides
- Compare to your projection
- Bet the side where your edge exceeds the vig
- Line shop across multiple books
For One-Way Markets
- Assume the vig is 20-30% or higher
- Only bet when you have overwhelming evidence of mispricing
- Consider promotional boosts that improve the math
- Never make these a core part of your strategy
Tip
Pro Tip: If you're serious about prop betting, focus 80%+ of your volume on standard two-way markets. One-way markets should be occasional plays when you have a specific, quantifiable edge—not regular bets.
📝 Exercise
Instructions
Test your understanding of market structures and their implications for your betting strategy.
You see 'Derrick Henry Anytime TD: Yes +120' with no 'No' option. What type of market is this?
Why are one-way markets considered more dangerous for bettors?
You see a prop with Yes +350 / No -500. What should you conclude?
What percentage of your prop betting volume should focus on standard two-way markets?