OddsBoard app Snapshot Nov 8, 2026
Cross Platform Comparison in OddsBoard: One Event, Fees Included
The question OddsBoard gets asked to answer is simple: the same event trades at two prices on two platforms, so which one do I use. The honest answer has three parts, and the app is designed to show all three together. The prices, the exact question wording on both sides, and the fees. Miss any one of the three and the comparison misleads.
Fees are the part most comparison tools skip, because platforms publish them in incompatible formats. The dataset behind this site quotes each platform's own published wording, from formula based schedules to the cent per contract figures in CME's filings. In the app, the fee text travels with the price, so a two cent price edge that costs three cents in fees reads as what it is: not an edge.
| Platform | Markets tracked | Fees, as published (shortened) |
|---|---|---|
| CME Group Event Contracts | 28 | Exchange fees in CME listing filings: CME Globex $0.01 per contract for members and non members, cash settlement $0.00; position adjustment or transfer $0.10 and give up surcharge $0.05 i... |
| DraftKings Predictions | 0 | DraftKings charges a $0.01 transaction fee for each event contract bought or sold, plus a separate exchange fee; its fee schedule gives CME markets total fees of $0.01 per contract at pri... |
| FanDuel Predicts | 0 | No fee schedule published in the data collected. |
| ForecastEx | 35 | Interactive Brokers pricing: ForecastEx forecast contracts USD 0.00 commission per contract plus third party exchange fee USD 0.01 per contract |
| Kalshi | 456 | Taker fee formula fees = round up(0.07 x contracts x price x (1 minus price)); peaks at $1.75 per 100 contracts at $0.50; maker fee formula uses 0.0175 where charged; no settlement fee an... |
| Limitless | 28 | AMM markets flat 0.40 percent on all trades; order book takers pay buy fees of 0.40 percent to 3.00 percent in outcome tokens and sell fees of 0.42 percent to 1.50 percent in USDC; makers... |
| Manifold | 89 | No fee schedule published in the data collected. |
| Metaculus | 0 | No fee schedule published in the data collected. |
| Myriad Markets | 23 | Order book fees apply to takers only, with a peak fee rate of 1.5 percent at $0.50 decaying linearly to zero at the extremes, and makers pay no fees and receive rebates; AMM markets charg... |
| Opinion | 0 | Fees apply to the taker only and makers are not charged; fees range from 0 percent to 1 percent on a topic_rate x price x (1 minus price) curve, highest near a 50 percent price, with a $0... |
| PancakeSwap Prediction | 0 | Participation fee of 3 percent of each round total prize pool; the Prediction FAQ says 3 percent of each round total pot goes to the treasury, of which 100 percent is used to buy back and... |
| Polymarket | 410 | Taker fee rate by category in docs: Finance 0.04, Economics 0.05, Crypto 0.07, maker fee rate 0; fee peaks at $1.00 per 100 Finance shares at $0.50; no Polymarket fees to deposit or withd... |
| Polymarket US | 0 | Standard taker fee Fee = theta x contracts x price x (1 minus price) with theta 0.0695, max $1.74 per 100 contracts at $0.50; tiered taker coefficients run from 0.095 below $10,000 traili... |
| Predict.fun | 0 | Makers pay no fee; takers pay from 0.018 percent to 2 percent depending on share price, calculated as base fee 2 percent x min(price, 1 minus price) x shares, peaking at $1.00 per 100 sha... |
| Robinhood Event Contracts | 29 | From June 1 2026 commission = k x price x (1 minus price) x contracts, where k is 10 percent without Gold or 5 percent with Gold, rounded up to the nearest $0.01 and capped at $0.01 per c... |
Scale is the other half of the comparison. The chart counts finance markets tracked per platform in the dataset, and it explains why most real comparisons involve the same two names. Kalshi and Polymarket between them list the large majority of the book; the long tail of venues matters for specific contracts, not for general price shopping.
There is a failure mode the app is built to avoid: showing a blended price. Averaging two platforms into one number feels helpful and destroys information, because the blend corresponds to no contract anyone can buy, at a fee nobody charges, under rules nobody wrote. OddsBoard never blends. It shows both prices, both questions, both fees, and lets the difference stand as the finding. In a market whose entire value is priced disagreement, a tool that averages the disagreement away has misunderstood the product it is tracking.
The comparison view quietly teaches market structure. A user who checks three events across two platforms learns where spreads live, which venue leads on which category, and how often the cheaper price is cheaper because the question is different. That education is the retention mechanism: the app is not competing on speed with the platforms, it is competing on understanding against every other tab the user has open. Tools that make users smarter about a market tend to keep them; tools that only make them faster tend to be replaced by the venues themselves.
The app concept stops where it should. It compares, dates and links. Execution stays on the platforms, under their rules, in the reader's own account. A comparison tool that respects that boundary stays useful for years; one that blurs it becomes a liability with a chart attached.
Snapshot data: prices and volume were collected from the platform on Nov 8, 2026. They are dated snapshots, not live quotes. Use the live market link for current prices.