Privacy and data sources
Last updated 29 October 2026.
No accounts, no tracking
No sign-up, cookies, analytics, ads or tracking pixels. The site never asks for a password or card details, and sells nothing.
Your settings stay with you
Your watchlist and page settings are saved in your own browser. Nothing is sent to this project, which has no server.
Public data, credited
Every number comes from the free sources listed below or is calculated by this project. Each source keeps its own terms.
What is saved in your browser
The site uses your browser's local storage, which stays on your device until you clear it, and session storage, which is emptied when
you close the tab. Neither is ever sent to this project or anyone else. Other people using the same browser profile can see them.
Every item's name starts with qp:v1:, so it can't be confused with other sites on github.io. No personal data is collected:
there are no accounts, forms, cookies or analytics.
| Stored item | What it holds | Used by |
|---|---|---|
theme, lang | Light or dark mode, and English or Korean | Every page |
visited | That you have been here before, so the first visit opens Start here | Every page |
watchlist, saved | The symbols on your watchlist (saved is from an older version) | Global, Markets |
ticker, stockIndicators | The last stock you opened and the indicators you turned on | Stock, Financials, Markets |
finnhubKey | Your Finnhub API key, only if you saved one in ⚙ settings: in session storage until you close the tab, or in local storage if you ticked "Remember on this device" | Live, Financials |
liveSymbol, pc:type, pc:studies, pc:interval:…, pc:legendFolded, pc:draw:… |
The live chart's symbol, chart type, indicators, intervals, legend and your drawings per symbol | Live |
q:opt, q:risk, q:pf, q:circuit | Your inputs in the option, risk, portfolio and circuit labs | Quantum |
compare | The tickers you last compared | Compare |
alerts | Your price alerts: symbol, condition, value, and when each one triggered | Live (checked on every page while the tab is open) |
The same button is at the bottom of every dashboard page ("Clear my saved data"). Your browser's own "clear site data" setting removes everything too.
Your Finnhub key
The optional Finnhub key is a password-like credential for your own free Finnhub account. It is kept only in this browser and sent only to finnhub.io, never to this project or to GitHub. Unless you tick "Remember on this device", it is forgotten when you close the tab; don't tick that box on a shared computer. You can remove it in ⚙ settings or with the button above, and revoke it in your Finnhub account at any time.
Which services your browser contacts
Like any website, each service below receives your IP address and basic browser details when your browser contacts it, under its own privacy policy.
| Service | When | What it receives |
|---|---|---|
| GitHub Pages (chanwoo777.github.io) | Every visit: it hosts the site and its data files | The files you load. GitHub privacy statement |
| jsDelivr (cdn.jsdelivr.net) | Pages with charts: Plotly and TradingView Lightweight Charts load from it | The library files. jsDelivr privacy policy |
| Binance public market data (data-api.binance.vision, data-stream.binance.vision) | Any chart or lab that shows a coin's price history | The symbol and interval you view. Binance privacy |
| CNBC quotes and charts (quote.cnbc.com, ts-api.cnbc.com) | Any chart or lab that shows a stock's, ETF's or index's price history, the Live page and price alerts (every 15 s while you have an armed alert) | The symbols you view. CNBC (Versant) privacy |
| Finnhub (finnhub.io, ws.finnhub.io) | Only if you saved a key | Your key and the symbols you request. Finnhub privacy policy |
| Sites you click through to | Only when you open a link (news, SEC filings, papers) | Whatever that site collects |
Where the data comes from
A computer belonging to the project's owner collects the data below once a day and publishes it as files on GitHub Pages. Each source keeps its own terms, and the credit belongs to it. No price history is published: every chart and calculation that needs past prices loads them in your browser, from CNBC for stocks, ETFs and indices and from Binance for coins. CNBC has no data for Tokyo and Hong Kong listings, so those show scores and returns without a chart.
| Source | Used for | Terms |
|---|---|---|
Yahoo Finance, through the open-source yfinance library | The latest closing price and company fundamentals. Daily prices and analyst ratings are used on the owner's computer to calculate returns, volatility, scores, percentiles and signals; only those calculated numbers are published, not the price history or any analyst rating. | Yahoo terms of service, which allow personal use. Publishing these fields is the owner's choice; rights holders can ask for removal (see the end of this page). |
| FRED, Federal Reserve Bank of St. Louis | Interest rates (including the 3-month T-bill yield on the Quantum page), inflation, jobs and credit spreads | FRED legal notices; some series carry their own copyright notes |
| SEC EDGAR | Financial statements from 10-K and 10-Q filings | Public filings, collected under the SEC's fair-access rules |
| Kenneth R. French Data Library | Fama-French factor returns | Data Library, credited here |
| CoinGecko | Which 250 coins are covered, by market value | Data provided by CoinGecko |
| Nasdaq Trader symbol directories | The list of US-listed ETFs | Symbol directory definitions |
| News RSS feeds (Google News, Yahoo Finance, CNBC, MarketWatch) | Headlines with links; tone scored by the FinBERT model | Only headlines and links are shown; no article text is republished. Model: ProsusAI/finbert |
| This project | Scores, signals, regimes, indicators, factor regressions and the quantum simulations | Calculated from the sources above. Code under the MIT license |
Software: Plotly.js (MIT) draws the charts; TradingView Lightweight Charts (Apache 2.0) draws the live chart, which shows TradingView's attribution logo as its license asks; the nightly quantum simulations use Qiskit (Apache 2.0) on the owner's computer.
What this site is not
- The disclaimer at the foot of every page applies. Scores and positive / neutral / negative signal labels rank names against their peers; they are not predictions or recommendations. Prices may be delayed or wrong.
- Not a service. Nothing is sold, there are no paid features, and the site can't place orders or connect to a broker.
- Quantum results are simulations on an ordinary computer, for learning only.
Questions and removal requests
Open an issue on GitHub. To report a security problem privately, follow the security policy.