Privacy Policy
Last updated: October 6, 2026
Stock Tracking Widget ("the extension") shows stock prices, charts and alerts for Vietnam, the US and 12 other markets while you browse. It needs no account and has no analytics, tracking or ads. This policy explains what data the extension handles and where it goes.
Data stored on your device
Your settings, watchlists, price alerts, chart drawings, tracked positions, portfolio, strategy bots and alert history are stored in your browser (chrome.storage.local). They never leave your device unless you turn on one of the features below. Uninstalling the extension deletes them. You can export or import them from the toolbar popup.
Data sent only when you use a feature
| Feature (off until you set it up) | What is sent | Sent to |
|---|---|---|
| Sync across devices (Pro) | Watchlists, settings and scanner rules | Your own Chrome account (chrome.storage.sync, operated by Google) |
| Alerts to Telegram / Discord / webhook | The text of your alerts, with the bot token or webhook URL you entered | Telegram, Discord or the https address you entered |
| Pro license | Your license key and an instance id | Lemon Squeezy, our payment and license provider |
| Backup US prices (optional) | Symbols of the US stocks you watch, with your own Finnhub key, only when Yahoo Finance does not answer | Finnhub |
| AI chart read | Chart figures of the stock you ask about, with your own Anthropic API key | Anthropic |
| Economic calendar | Nothing about you (a plain request for the public calendar) | The public calendar feed |
| Send feedback | The answers you type and, only if you fill it in, your email address | Tally, our form provider |
Keys and tokens you enter (license key, Telegram bot token, Discord webhook, Anthropic API key, Finnhub key) are stored in your browser and sent only to the service they belong to. The Anthropic and Finnhub keys are never included in backups or sync.
Market data
Prices, charts, fundamentals, corporate events and news are downloaded from public sources: VPS, VNDirect and SSI (Vietnamese stocks), Yahoo Finance (US and international stocks), the Taiwan Stock Exchange (Taiwanese prices) and Tencent (mainland Chinese prices), open.er-api.com (exchange rates) and the RSS feeds of CafeF, Vietstock, VnExpress and Yahoo Finance. These requests contain no personal data. To read some US data, the extension asks Yahoo for a session cookie, which Yahoo stores in your browser like any visit to its site; it is used only for those requests.
Web pages you visit
The extension shows its widget on the pages you visit and looks for tickers such as $FPT or $AAPL to show a price tooltip. This happens on your device only: page content and your browsing history are not recorded or sent anywhere. The address of the current tab is used only to let you hide the widget on that site.
What we do not do
- We do not sell, rent or share your data.
- We do not collect personal information such as your name, email address or location.
- Pro is bought on Lemon Squeezy's checkout page. Your payment details go to Lemon Squeezy and never pass through the extension.
- We do not use your data for advertising or to assess creditworthiness.
- Strategy bots only send you signals. They never connect to your brokerage account or place orders.
- Nothing the extension shows is investment advice.
Uninstall survey
If enabled, after you uninstall the extension your browser opens a short optional form. Its address contains only the extension version, the interface language and the number of days it was installed. No identifier is included.
Changes
If the extension starts handling data in a new way, this policy is updated first and the date above changes.
Contact
Questions about this policy: haigiang.1998@gmail.com