Local-first analytics for prediction market traders
Try it live at eventide.s11a.com
Eventide turns your Robinhood Derivatives PDF statements into actionable trading analytics — entirely in your browser. No server, no cloud, no account. Upload your monthly statements and instantly see your true P&L, win rate, fee drag, and category performance.
Robinhood's monthly statements are dense PDFs with YES/NO contract legs reported separately. Understanding your actual performance requires cross-referencing sections, pairing opposite legs, and reconciling settlements. Eventide does all of this automatically.
What you get:
- Dashboard — Net liquidity over time, realized P&L, win rate, fee drag, open positions, and trading profit at a glance
- Position Journal — Grouped by symbol with net P&L. Expand any position to see underlying YES/NO legs, entry/exit prices, and settlement details
- Analytics — Category performance charts (NFL, NBA, Economics, etc.), volume treemaps, and fee analysis breakdowns
- Multi-statement support — Import multiple monthly PDFs at once with aggregate preview and per-file breakdown
Your financial data never leaves your browser.
| Principle | How |
|---|---|
| No Server Upload | PDFs parsed entirely in-browser using WebAssembly |
| No Cloud Database | Data stored in your browser's IndexedDB via wa-sqlite |
| No Telemetry | Zero analytics, tracking, or usage monitoring |
| No Account | No email, no login, no personal information collected |
| Open Source | Fully auditable — verify every claim in the source |
| Offline Capable | Works without internet after initial load |
The only network request is loading the app itself. Everything else — parsing, calculations, storage — runs locally.
- Node.js 18+
- npm or pnpm
- A Chromium-based browser (Chrome 119+, Edge 119+, or Brave 1.60+)
git clone https://github.com/snimmagadda1/rubbin-hood.git
cd rubbin-hood
npm install
npm run devOpen http://localhost:3000 and upload your first statement.
Don't have a statement handy? Click Try Demo on the landing page to explore the app with sample data. When you upload your first real statement, the demo data is automatically replaced.
PDF Upload → pdf.js → Section Parsers → wa-sqlite/IndexedDB
↓
React UI ← TanStack Query ← SQL queries
↑
Zustand (filters, UI state)
Eventide parses 7 sections from Robinhood Derivatives monthly statements:
| Section | Content | What It Provides |
|---|---|---|
| 2 | Monthly Trade Confirmations | Individual trades with prices, quantities, fees |
| 3 | Non-Trade Activity | Account activity records |
| 4 | Purchase and Sale | Prior-period settlements, closing trades |
| 5 | Purchase and Sale Summary | Source of truth for P&L — paired YES/NO totals per symbol |
| 6 | Journal Entries | Cash flows: deposits, withdrawals, interest |
| 7 | Open Positions | Unrealized positions with current market value |
| 10 | Account Summary | Net liquidity, ending cash, total fees |
Trades from Sections 2 and 4 are deduplicated automatically. P&L figures from Section 5 are cross-validated against FIFO calculations with per-symbol discrepancy reporting.
Robinhood reports prediction market trades as separate YES/NO legs. Buying "Team A wins" shows as YES 100 @ $0.50, and selling it shows as NO 100 @ $0.43 — making raw trade logs hard to read.
Eventide groups these into positions:
| What you see | What's underneath |
|---|---|
| PHI — Won $27.80 | YES 130 @ $0.79 + NO 130 @ $1.00 (settlement) |
| TENN — Lost $186.00 | YES 400 @ $0.75 + NO 400 @ $0.29 (settlement) |
Click any position to expand and see every leg, fill, and settlement — in chronological order.
P&L is computed in SQL using Section 5 as the authoritative source, not approximated from trade logs:
- Per-trade P&L: Computed from settlement price vs entry price
- Per-position P&L: Sourced directly from the statement's Purchase and Sale Summary
- Validation: FIFO-calculated P&L is compared against reported figures with a $0.01 tolerance
- Discrepancy reporting: Any mismatches are flagged during import preview, before you commit
Six metric tiles with trend indicators and sparklines:
- Net Liquidity — Total account value over time
- Realized P&L — Closed position performance
- Trading Profit — Gross P&L minus fees
- Win Rate — Wins vs losses with counts
- Total Fees — Commission and exchange fee drag
- Unrealized P&L — Open position exposure
- Position grouping — One row per symbol, expandable to individual legs
- Net P&L per position — From Section 5 source of truth
- Filtering — By date range, category, symbol, P&L range, open/closed status
- Sorting — By date, symbol, P&L, fees, category, status
- Pagination — 25/50/100 per page
- CSV export — Download flat trade data with all fields
- Category Performance — Bar chart comparing net P&L across NFL, NBA, Economics, Politics, Golf, and 10+ other categories
- Volume Treemap — Visual breakdown of trading volume by category
- Fee Analysis — Fee impact by category with drag percentages
- Import History — View and manage individual statement imports
- Storage Indicator — See how much browser storage your data uses
- Data Export — Download your complete dataset
- Default View — Choose your landing page
- Data Wipe — Delete all imported data with confirmation
- Drag and drop or select multiple PDFs at once
- Sequential parsing with per-file progress
- Aggregate preview with per-file breakdown table
- Per-file duplicate detection with replace or skip options
- Resume remaining files after handling a duplicate
| Layer | Technology |
|---|---|
| Framework | Next.js 16, React 19 |
| Language | TypeScript (strict) |
| Styling | Tailwind CSS v4, shadcn/ui |
| Database | wa-sqlite with IndexedDB (OPFS) |
| PDF Parsing | pdf.js with custom section parsers |
| State | TanStack Query v5, Zustand |
| Tables | TanStack Table v8 |
| Charts | Recharts |
| Testing | Vitest |
Eventide requires a Chromium-based browser for OPFS (Origin Private File System) support:
| Browser | Supported | Minimum Version |
|---|---|---|
| Chrome | Yes | 119+ |
| Microsoft Edge | Yes | 119+ |
| Brave | Yes | 1.60+ |
| Firefox | No | OPFS not supported |
| Safari | No | OPFS not supported |
npm run dev # Dev server at http://localhost:3000
npm run build # Production build (static export)
npm run lint # ESLint
npx tsc --noEmit # Type check
npm test # Vitest watch mode
npm run test:run # Single run (390+ tests)
npm run test:coverage # With v8 coveragesrc/
├── app/(app)/ # Pages: dashboard, trades, analytics, settings, upload
├── components/
│ ├── ui/ # shadcn/ui primitives
│ ├── dashboard/ # Dashboard tiles and sparklines
│ ├── trade-journal/ # Position table, filters, badges
│ ├── charts/ # Recharts wrappers
│ └── upload/ # File uploader, preview, progress
├── features/ # Cross-cutting: imports, analytics, demo, settings
├── hooks/ # TanStack Query wrappers
└── lib/
├── db/ # wa-sqlite client, schema, migrations, queries
├── parsing/ # PDF section parsers, FIFO, validation
├── calculations/ # P&L computation, fee attribution
└── state/ # Query client, Zustand stores
Contributions are welcome. A few ground rules:
- P&L is computed in SQL, never in JavaScript
- All parsing logic is pure TypeScript with no React dependencies
- Named exports only (no default exports except page/config files)
- Run
npm run lint && npx tsc --noEmit && npm run test:runbefore submitting a PR - See AGENTS.md for detailed code style and architecture guidelines
MIT
Your trading data stays on your device. Always.