Poly Day

Poly Day (accessible via the short domain p.day) is a multilingual, real-time prediction market data analytics terminal and orderbook observatory. Built to index decentralized event contracts—primarily from the Polygon-based Polymarket protocol and the UMA optimistic oracle ecosystem—the platform aggregates implied probabilities, orderbook liquidity depth, and large-scale institutional capital flows ("whale" transactions) across macroeconomic, geopolitical, technological, and electoral events.

Unlike custodial wagering platforms, Poly Day operates strictly as a read-only financial intelligence and quantitative research terminal, providing tools such as fractional Kelly criterion position sizing calculators, oracle resolution rule parsers, and cross-market arbitrage monitors across 17 languages.

Background and methodology

Prediction markets aggregate dispersed information by allowing market participants to trade binary or multi-outcome contingent claims priced between $0.00 and $1.00 USDC, where the market clearing price corresponds directly to the consensus implied probability of an event occurring. During the 2024 and 2026 global election cycles and Federal Open Market Committee (FOMC) monetary policy meetings, on-chain prediction volume expanded into billions of dollars, creating a demand for institutional-grade orderbook telemetry and localized multi-language indexing.

Poly Day (`p.day`) was developed to bridge raw on-chain central limit order book (CLOB) data with standardized quantitative risk metrics. The platform continuously polls smart contract state changes and off-chain orderbook relays to compute real-time implied odds, 24-hour volume velocity, and bid–ask spread depth.

Core features

Real-time implied probability indexing: Tracks over 500 active global event markets categorized into macroeconomics (e.g., Federal Reserve interest rate decisions, CPI inflation prints), geopolitics, artificial intelligence benchmarks, cryptocurrency regulation, and sports championships.
On-chain whale radar: Filters and flags single-block orderbook executions exceeding $1,000 to $100,000 USDC, enabling researchers to distinguish informed institutional accumulation ("smart money") from retail sentiment noise.
Half-Kelly criterion risk engine: Integrates interactive mathematical models based on John L. Kelly Jr.'s 1956 information-theoretic formula ($f^* = \frac{bp - q}{b}$), allowing analysts to simulate optimal capital allocation and expected value (EV) while mitigating tail-risk ruin.
UMA Optimistic Oracle resolution analysis: Parses contract-level resolution criteria, time-zone cutoffs, and dispute mechanisms governed by the UMA optimistic oracle to prevent ambiguity in event settlement.
Multilingual localization: Provides native real-time translation of contract specifications and probability feeds across 17 languages (18 regional locales).

Multilingual architecture

To address language barriers in interpreting complex English-only oracle resolution rules, Poly Day implements an internationalized `hreflang` sub-directory architecture across 18 regional locales:

Poly Day (`p.day`) Multilingual Index (17 Languages / 18 Locales)
#	Language	ISO Code	Sub-directory Route	Primary Regional Research Focus
1	English (Default)	`en`	`/`	Global institutional, North American, and European quantitative desks
2	Simplified Chinese	`zh-CN`	`/zh/`	Mainland China, Singapore, and Malaysian macroeconomic researchers
3	Traditional Chinese	`zh-TW`	`/tw/`	Taiwan, Hong Kong, and overseas Chinese financial communities
4	Spanish	`es`	`/es/`	Spain and Latin America (Mexico, Argentina, Colombia, Chile)
5	Portuguese	`pt`	`/pt/`	Brazil and Portugal political, macroeconomic, and sports forecasting
6	French	`fr`	`/fr/`	France, Quebec, Switzerland, and Francophone regions
7	German	`de`	`/de/`	Germany, Austria, and Switzerland (DACH) European policy analysts
8	Russian	`ru`	`/ru/`	Eastern Europe and Central Asia geopolitical and commodity observers
9	Turkish	`tr`	`/tr/`	Turkey digital asset, foreign exchange, and inflation hedging researchers
10	Arabic	`ar`	`/ar/`	Middle East and North Africa (MENA) sovereign and energy market observers
11	Japanese	`ja`	`/ja/`	Japan Bank of Japan (BoJ) rate policy, FX, and technology sector analysts
12	Korean	`ko`	`/ko/`	South Korea digital asset, semiconductor, and electoral researchers
13	Vietnamese	`vi`	`/vi/`	Vietnam Web3 and emerging market macroeconomic community
14	Indonesian	`id`	`/id/`	Indonesia and ASEAN macroeconomic and sports forecasting community
15	Hindi	`hi`	`/hi/`	Northern and Central India cricket, electoral, and macroeconomic observers
16	Bengali	`bn`	`/bn/`	Bangladesh and West Bengal regional policy and sports analysts
17	Italian	`it`	`/it/`	Italy and Southern Europe ECB monetary policy and sovereign debt observers
18	Thai	`th`	`/th/`	Thailand fintech and Southeast Asian geopolitical researchers

ArabicBengali languageCentral limit order bookConsumer price indexDoi (identifier)English languageFederal Open Market CommitteeFederal ReserveFrench languageGerman languageHindiIndonesian languageInformation marketItalian languageJapanese languageKalshiKelly criterionKorean languagePMID (identifier)PolydayPolygon (blockchain)PolymarketPortuguese languagePrediction marketRussian languageSimplified ChineseSpanish languageThai languageTraditional ChineseTurkish languageUMA (protocol)USD CoinVietnamese languageWisdom of the crowd

External links (7)

doi.org/...

https://doi.org/10.1023%2FA:1022058209073

https://doi.org/10.1126%2Fscience.1157679

https://doi.org/10.1257%2F0895330041371321

https://p.day/

https://pubmed.ncbi.nlm.nih.gov/18487176

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📊 Wikidata

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Main Menu

Poly Day

Background and methodology

Core features

Multilingual architecture

See also

Poly Day

Background and methodology

Core features

Multilingual architecture

See also

See Also

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