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Breadth Chart Analyst

breadth-chart-analyst

This skill should be used when analyzing market breadth charts, specifically the S&P 500 Breadth Index (200-Day MA based) and the US Stock Market Uptrend Stock Ratio charts. Use this skill when the user provides breadth chart images for analysis, requests market breadth assessment, positioning strategy recommendations, or wants to understand medium-term strategic and short-term tactical market outlook based on breadth indicators. Also works WITHOUT chart images by fetching CSV data directly from public sources. All analysis and output are conducted in English.

Install

Research and analysis tools, not financial advice. Some workflows use optional FMP, FINVIZ Elite or Alpaca accounts; the repo's five-skill starter path needs no API key. Open the repository

Run this in your project folder. It works with Claude Code, Cursor, Codex and dozens of other agents.

$ npx skills add tradermonty/claude-trading-skills --skill breadth-chart-analyst

Needs Node.js. Add -g to install for every project, or -a claude-code to skip the agent picker.

How to use Breadth Chart Analyst

Once it's installed, Claude reads this skill on its own whenever a request matches what it's for, so you don't have to mention it by name. In Claude Code you can also run it directly by typing /breadth-chart-analyst.

It includes scripts that Claude may run on your computer, so skim them on GitHub before you install.

What the instructions cover

  1. 1Overview
  2. 2When to Use
  3. 3Prerequisites
  4. 4Output
  5. 5Core Principles
  6. 6Chart Types and Purposes
  7. 7Analysis Workflow
  8. 8Quality Standards
  9. 9Common Analysis Errors and How to Avoid Them
  10. 10Example Usage Scenarios
  11. 11Resources
  12. 12Special Notes

Section headings from the skill's SKILL.md file.

What's inside · 18 files

  • SKILL.md
  • assets/SP500_Breadth_Index_200MA_8MA.jpeg
  • assets/US_Stock_Market_Uptrend_Ratio.jpeg
  • assets/breadth_analysis_template.md
  • references/breadth_chart_methodology.md
  • requirements.txt
  • scripts/detect_breadth_values.py
  • scripts/detect_uptrend_ratio.py
  • scripts/extract_chart_right_edge.py
  • scripts/fetch_breadth_csv.py
  • scripts/tests/__init__.py
  • scripts/tests/conftest.py
  • scripts/tests/test_detect_breadth_values.py
  • scripts/tests/test_detect_uptrend_ratio.py
  • scripts/tests/test_detect_uptrend_ratio_synthetic.py
  • scripts/tests/test_extract_chart_right_edge.py
  • scripts/tests/test_fetch_breadth_csv.py
  • scripts/tests/test_fetch_breadth_csv_io.py

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