JoinProp
  • Home
  • Best Prop Trading Firms
    • CFD Prop Firms
    • Futures Prop Firms
    • Instant Funding Prop Firms
    • Halal Prop Firms
    • Best Prop Firms in the UK
    • Best Prop Firms in the USA
    • Best Prop Firms in the UAE
    • Best Prop Firms for MT5
    • Prop Firm Offering 1 Million Dollars Funding
    • Prop Firms That Scale to $2 Million
    • Prop Firms That Scale to $4 Million
    • 1-Step Prop Firms
    • Buy Now, Pay Later Prop Firms
    • No Time Limit Prop Firms
  • Comparisons
    • Compare Futures Prop Firms
  • Prop Firm Guides
    • Real Prop Challenge
    • Prop Firm Payouts
    • One Prop Trader a Day
    • Prop News
  • Prop Trading Discounts
  • Prop Trading Glossary
  • About Us
Skip to glossary content
Home/Glossary/Implied probability

Prediction markets · Pro

Implied probability

By Omer Rapaport · Content updated 11 September 2026

What does Implied probability mean?

Implied probability interprets a contract price relative to its conditional payout as a market probability estimate. For a standard $1-or-zero binary payoff, a 60-cent price is commonly read as approximately 60%.

Example

A trader's own estimate is 65% while the contract trades at 60 cents, a five-cent expected payoff difference before costs under that estimate.

Illustrative example; not a provider’s quoted offer.

Why it matters for prop traders

Fees, spread, liquidity and forecast error affect the trade. A displayed midpoint may not be an executable price and the market can be wrong.

Sources and further reading

The following primary sources support the terminology. Provider rules describe their own products and may change.

  • Polymarket - Prices and order book

Related terms

  • Event contract
  • Liquidity-based position cap
  • Market close time
← All 181 terms

Frequently asked questions

Is a market's implied probability a guaranteed forecast?

Fees, spread, liquidity and forecast error affect the trade. A displayed midpoint may not be an executable price and the market can be wrong.

Sources: Polymarket - Prices and order book

What is a practical example of Implied probability?

Illustrative example: A trader's own estimate is 65% while the contract trades at 60 cents, a five-cent expected payoff difference before costs under that estimate.

Sources: Polymarket - Prices and order book

About JoinProp

JoinProp is your trusted gateway to the world of proprietary trading. We provide clear, unbiased firm reviews, comparison tools, and educational content to help traders at all levels make smarter decisions and grow their trading careers. Whether you’re just getting started or scaling up, JoinProp is here to guide your journey.

Follow us
  • youtube
  • facebook
  • linkedin
  • instagram
  • spotify
  • x
Newsletter
Stay ahead of the market
Firm reviews, deal alerts & funded trading insights.
No spam. Unsubscribe any time.

    • What is Prop Trading?
    • How do we Rank Firms?
    • Why Should You Trust Joinprop?
    • Prop News
    • Test your Prop Trading Knowledge

FAQs

  • About Us
  • Terms | Privacy
  • Contact Us

JoinProp
Logo
SFX Funded
65% OFF
JoinProp Exclusive · 65% off for new traders with code JoinProp
JoinProp
Get deal → See all discounts →
Great
Based on 2,345 reviews
Trustpilot
Verified
Vital resource for any trader
Having a reliable resource to check the legitimacy of new funding programs is vital for my trading journey. The unbiased metrics let me evaluate profit targets without being distracted by flashy marketing.
Trustpilot Reviewer · 2 days ago
Verified
Top tier comparison tools
JoinProp has top tier comparison tools for finding honest instant funding firms, definitely recommend using them. The platform updates are decent and the interface keeps improving.
Trustpilot Reviewer · 3 days ago
Verified
Found the perfect swing trading firm
Navigating the prop space is a minefield with companies hiding strict rules in their T&Cs, but this hub let me filter out the nonsense and find a firm that truly supports swing traders.
Trustpilot Reviewer · 5 days ago
Verified
Discount code saved me money
I found a provider that allows holding trades over the weekend without penalty. I even used a JoinProp code for my latest challenge which saved me a decent chunk of money at checkout.
Trustpilot Reviewer · 1 week ago
Verified
No more fine print nightmares
Understanding contract fine print is usually a nightmare, but this site highlights the crucial drawdown limits instantly. I never have to guess scaling requirements before committing capital.
Trustpilot Reviewer · 1 week ago
Showing our latest reviews