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Install in OpenClaw
/install chart-master
Description
Generate precise financial charts (candlestick, OHLC, line) for stocks, indices, and crypto using Python. Use when the user requests a visual chart, technica...
README (SKILL.md)
Chart Master
This skill generates professional-grade financial charts using Python (mplfinance / yfinance).
Usage
Run the bundled script to generate a chart. The script fetches data automatically.
Command
uv run --with yfinance --with mplfinance --with pandas {baseDir}/scripts/generate_chart.py --ticker "NVDA" --period "6mo" --interval "1d" --style "yahoo" --title "NVIDIA Daily Chart"
Parameters
--ticker: The symbol to chart (e.g.,AAPL,BTC-USD,^NDX,^GSPC).--period: Data range (e.g.,1d,5d,1mo,3mo,6mo,1y,2y,5y,max,ytd).--interval: Bar size (e.g.,1m,5m,15m,30m,60m,90m,1h,1d,5d,1wk,1mo,3mo).- Note: Intraday data (
1m-60m) is only available for the last 60 days.
- Note: Intraday data (
--type: Chart type (default:candle; options:candle,line,renko,pnf).--style: Visual style (default:yahoo; options:binance,blueskies,charles,checkers,classic,default,mike,nightclouds,sas,starsandstripes,yahoo).--mav: Moving averages (comma-separated, e.g.,20,50,200).--volume: specific flag--volumeto show volume pane (default: true).
Output
The script saves a PNG file to the current working directory and prints the filename.
Action: Use the read tool (or write if editing) to handle the file, but primarily display the image to the user using the appropriate tool if available, or simply confirm the file was created and provide the path.
Usage Guidance
This skill appears coherent and limited to generating charts. Before installing, confirm you trust the skill source and are okay with the script making outbound requests to Yahoo Finance (yfinance). When running it on a shared agent or server, note that the PNG is written to the current working directory and the script prints the absolute file path (MEDIA: ...), which could appear in logs. Also be aware you'll need to provide the Python dependencies (yfinance, mplfinance, pandas) in the runtime environment. There's a minor bug/quirk: the --volume flag is defined with action='store_true' but default=True, so volume will effectively always be enabled unless you modify the script flags; this is not a security issue but may affect expected output.
Capability Analysis
Type: OpenClaw Skill
Name: chart-master
Version: 1.0.0
The chart-master skill bundle is a legitimate tool for generating financial visualizations using standard Python libraries (yfinance, mplfinance). The script scripts/generate_chart.py uses argparse for safe parameter handling and performs no suspicious network, file, or system operations beyond its stated purpose of fetching market data and saving PNG charts.
Capability Assessment
Purpose & Capability
Name/description match the included Python script and SKILL.md. The script only depends on yfinance, mplfinance, and pandas to fetch market data and draw charts; no unrelated binaries, credentials, or config paths are requested.
Instruction Scope
Runtime instructions tell the agent to run the bundled script which fetches market data via yfinance and writes a PNG to the working directory. This is within scope. Note: the script makes outbound network requests (to Yahoo Finance via yfinance) and prints an absolute path prefixed with 'MEDIA:' to signal the generated image — both are expected for this purpose but worth awareness.
Install Mechanism
No install spec is present (instruction-only with a bundled script). Dependencies are standard Python packages from public registries; nothing is downloaded from obscure URLs or executed from arbitrary archives.
Credentials
No environment variables, secrets, or extra credentials are required. The script does not attempt to read other config files or credentials. Dependency access to network-hosted market data is justified by the skill's purpose.
Persistence & Privilege
always is false and the skill does not request persistent/system-wide privileges or modify other skills. It simply writes an output image to the current working directory.
How to Use
- Make sure OpenClaw is installed (local or Docker)
- Run the install command in chat:
/install chart-master - After installation, invoke the skill by name or use
/chart-master - Provide required inputs per the skill's parameter spec and get structured output
Version History
v1.0.0
Chart Master v1.0.0 – Initial Release
- Generate high-quality financial charts (candlestick, OHLC, line, etc.) for stocks, indices, and crypto.
- Python-based workflow using `yfinance`, `mplfinance`, and `pandas`.
- Supports configurable date ranges, intervals, chart types, visual styles, and moving averages.
- Saves chart as a PNG and outputs the file path.
- Optimized for user requests needing visual technical analysis or price history plots.
Metadata
Frequently Asked Questions
What is Chart Master?
Generate precise financial charts (candlestick, OHLC, line) for stocks, indices, and crypto using Python. Use when the user requests a visual chart, technica... It is an AI Agent Skill for Claude Code / OpenClaw, with 238 downloads so far.
How do I install Chart Master?
Run "/install chart-master" in the OpenClaw or Claude Code chat to install it in one step — no extra setup required.
Is Chart Master free?
Yes, Chart Master is completely free, licensed under MIT-0. You can download, install and use it at no cost.
Which platforms does Chart Master support?
Chart Master is cross-platform and runs anywhere OpenClaw / Claude Code is available (cross-platform).
Who created Chart Master?
It is built and maintained by ericw12 (@ericw12); the current version is v1.0.0.
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