Stretch | Sports Lab

Prototype mode: No live sports feed or Kalshi prices are connected. All game examples are fictional. Estimates are illustrative, not predictions. No wagers are placed.

Command center

Tracked bets

Settled P/L

Win rate

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Open exposure

How Stretch works

1. Compare your probability estimate against a market price.

2. Calculate break-even probability, estimated edge and stake exposure.

3. Save a candidate manually, then record the outcome later.

Analyst scorecard

Model calibration and analyst rankings will appear here once verified historical predictions and outcomes are available. No fabricated performance scores.

Game Lab

Example matchup

FICTIONAL

Harbor Hawks vs. Metro Foxes

Demonstration only. No real matchup, odds, injury data or model forecast.

Probability & market comparison

Your estimated outcome probability (%)Market YES price (cents per $1 payout)

Break-even probability

48%

Estimated edge

+7 pp

Bet Builder

Manual candidate

Event / contract description

Stake ($)

YES price (¢)

Your probability estimate (%)

Gross payout if YES wins

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Estimated EV before fees

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Simplified binary YES contract: payout assumes fractional shares and no fees, spreads, slippage or rounding. Not an executable quote.

Live market research

Kalshi read-only feed

When deployed on Cloudflare Pages with the included API function, this tab can fetch public market prices. Secure the entire site with Cloudflare Access first. No independent probability model is connected.

Filter returned markets

Not connected.

Risk & uncertainty lab

Bankroll guardrails

Research-only calculations. No model is validated and no wager is placed.

Bankroll ($)

Maximum stake (% of bankroll)

YES market price (¢)

Your estimated probability (%)

Probability uncertainty (± percentage points)Estimated fees per contract (¢)

Conservative edge

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Conservative EV / contract

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Stake cap

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Quarter-Kelly reference

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What these numbers mean

Conservative probability = your estimate minus the uncertainty margin. Effective cost = YES price plus estimated fees. The conservative edge and EV use those assumptions. Quarter-Kelly is a mathematical reference, not a recommendation; it is capped by your maximum-stake setting and becomes zero when there is no positive conservative edge. These calculations do not account for order-book depth, liquidity, price changes or correlated bets.

Performance tracker

Saved candidates

No candidates saved yet.