NFL Prediction Markets: Pricing, Probability & Edge

An NFL prediction market quotes a contract that settles at $1 if an outcome happens and $0 if it does not. Because of that structure, the price is a probability statement: a YES contract trading around $0.63 generally represents a market-implied probability of roughly 63%, subject to fees, bid-ask spread and market mechanics. Harwld builds its own probability for the same outcome and reports the difference.

What Are Kalshi NFL Predictions?

They are prediction-market contracts on NFL outcomes — game winners, spreads and totals — where the traded price expresses the crowd's probability estimate. Harwld is an independent analytics platform and is not affiliated with or endorsed by Kalshi; it reads public pricing and compares it to its own model.

How Do NFL Prediction Markets Work?

1. A market is opened for a specific, objectively settleable NFL outcome.
2. Participants buy YES or NO at a price between 1c and 99c.
3. The traded price moves as news, injuries, weather and money arrive.
4. At settlement, the correct side is worth $1 and the other side is worth $0.
5. Fees and spread mean a small modeled difference is not necessarily a real one.

Current NFL Market vs Harwld Model

Harwld Vocabulary

What is Harwld Probability?

Harwld Probability is Harwld's own estimate that an outcome happens, produced by the Elo power rating and a 10,000-trial Monte Carlo simulation of the game. It is calculated independently of the market price and is never adjusted to look closer to it.

What is Winning Edge?

The Winning Edge Score is a 0-100 rating that combines the gap between Harwld Probability and market-implied probability with model confidence, data quality and transaction friction. A large probability gap on a low-confidence game scores lower than a moderate gap on a high-confidence game.

What does BUY YES mean?

It describes a market where Harwld's probability is meaningfully higher than the price implies, meaning the YES side looks underpriced relative to the model. It is an analytical description of pricing, not instruction or advice.

What does BUY NO mean?

The mirror case: the price implies a higher probability than Harwld's model supports, so the NO side is the underpriced one.

What does PASS mean?

The difference is too small to survive fees, spread and model uncertainty. PASS is a genuine output and most markets, most weeks, are a PASS.

What is an entry zone?

A price range in which the modeled difference still exists. Above that range the advantage has already been priced in. Harwld publishes explicit entry zones to Pro members inside the app.

What is a target exit?

A price at which most of the modeled difference has been absorbed by the market, so continuing to hold is no longer supported by the original reason for the position.

Why can Harwld disagree with the market?

Prices reflect participant sentiment, order flow, public bias and stale information as well as genuine forecasting. A model rebuilt from final scores weights those things differently — and sometimes the market is right and Harwld is wrong, which is why every prediction is graded publicly.

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