OpenCandle

Market research that shows its work.

OpenCandle is an open source financial investigator. It fetches live quotes, filings, options, and macro data before answering, then shows where the result came from.

npx opencandle@latest gui

Free and open source · runs locally · bring your own AI

The best tools behind every answer.

OpenCandle picks the relevant sources for the question and keeps each one attached to the result.

Yahoo Financequotes + options
SEC EDGARcompany filings
FREDmacro series
TradingViewmarket screeners
CoinGeckocrypto markets
Polymarketprediction markets
Redditmarket sentiment
Exaweb research
Braveweb search
Alpha Vantagemarket data
Local portfolioyour positions
See every data source

Same question.Different results.

Why not ask another AI? OpenCandle can use live financial tools before it answers, so you get current numbers you can inspect.

ChatGPT
Share

I own 200 shares of NVDA and I’m worried it could drop next month. Should I hold, sell some, or protect my investment?

Because your concern is only the next month, I would keep the 200 shares and hedge rather than sell outright.

Hold

Keep all the upside, but only if you can tolerate a 15–25% drawdown.

Sell some

Trim 50–100 shares if this has grown beyond roughly 15–20% of your portfolio.

Protect

A protective put limits downside. A collar can help pay for it, but caps your upside.

Share your cost basis, account type, and downside limit, and I can suggest a current strike and estimate the cost.

Ask ChatGPT

Common questions

What is OpenCandle?

OpenCandle is an open source AI research app for stocks, portfolios, and markets. It runs locally in a browser or terminal and checks current financial data before it answers.

Is it free?

OpenCandle is free and MIT licensed, with no OpenCandle account or subscription. You pay your AI model provider for usage. Core market data does not require paid data APIs.

How is this different from asking ChatGPT?

OpenCandle gathers quotes, filings, option chains, macro data, and portfolio context before answering. It then shows the source and timestamp behind the result, including anything it could not verify.

What do I need to get started?

You need Node.js and access to an Anthropic, OpenAI, or Google model through an API key or supported sign-in. OpenCandle provides the app and core market-data connections, with no OpenCandle account or subscription.

Does OpenCandle place trades?

No. OpenCandle is read-only research software. It gathers and organizes market evidence, but it does not place trades, route orders, or provide financial advice.

Where is my data stored?

Watchlists, portfolios, alerts, and sessions are stored on your machine. Questions and research context are sent to the model provider you choose.