Market Daybook Trading Journal — Privacy Policy
Effective date: July 8, 2026
Summary
Market Daybook Trading Journal is a local-only Chrome extension. It has no account, no server, and makes no network connections. All data you enter — your trades, journal notes, and settings — stays in your browser, on your own device. The developer never receives it.
What data the app handles
The extension works with:
- Trades you enter manually, paste from a broker's website, or import from a CSV file.
- Journal notes and context you attach to trades (plan strategy, trade mistakes, emotion/confidence ratings, free-text notes).
- Column mappings you create or save for paste and CSV import.
- Display preferences (your chosen theme) and onboarding/timezone settings.
- The trading plan you build (pre-trade checklist and strategies).
- Any private-beta check-in you choose to generate.
All of this is stored using your browser's built-in local storage, on your own device. Nothing is stored anywhere else.
What we collect: nothing
The extension collects no personal information, no analytics, no telemetry, and no advertising identifiers. It does not set tracking cookies. It has no user accounts and no sign-in.
This isn't just a policy — it's enforced by the extension itself. The extension's Content Security Policy includes connect-src 'none', which blocks the extension's pages from making any network connection at all. The app is technically incapable of sending your data anywhere, to us or anyone else.
Data you choose to share
Two features create a file on your device that you can choose to send us:
- Data export. A "Download CSV" or full JSON backup that contains your trades and journal data, saved to your computer for your own records.
- Private-beta check-in. A structured feedback file, created locally, that you may email to the developer if you're participating in the beta.
The beta check-in never includes your trades, P&L, symbols, account references, or journal notes — only your answers to a short set of structured workflow questions, an optional list of instrument types you trade, and any optional free-text notes you choose to type (for example, a broker name or a description of a point of friction). Redacted import-failure reports, if you choose to share one, work the same way: they contain error codes and structural information about a failed import, and explicitly exclude raw CSV rows, symbols, prices, quantities, timestamps, account references, and order/execution identifiers.
Nothing is ever sent automatically. You decide if and when to share a file you've created.
Your control over your data
From the app's Data & privacy screen you can:
- Export a full local JSON backup or a CSV of your trades at any time.
- Delete your trading history, saved column mappings, diagnostics, or all locally stored data, separately or together.
Uninstalling the extension removes all of its locally stored data from your browser.
Children's privacy
The extension is not directed at children and does not knowingly collect information from anyone, since it does not collect information from anyone at all.
Changes to this policy
If this policy changes, the effective date above will be updated and the revised policy will be posted at the same URL.
Contact
Questions about this policy or the extension: [email protected]