What is breadth-chart-analyst?

A guide for reading two stock-market breadth charts: charts showing how many stocks are above their 200-day average or are in an uptrend. It uses these charts to judge overall market health and timing.

Use it to assess market breadth, plan strategic positioning, or look for short-term swing-trading signals from supplied charts or CSV data.

It turns broad market participation data into a medium- or short-term market view instead of relying only on individual stocks.

breadth-chart-analyst — Skill for Claude Code by mphinance: A guide for reading two stock-market breadth charts: charts…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add skills/mphinance/alpha-skills/breadth-chart-analyst

Any agent

npx skills add mphinance/alpha-skills --skill breadth-chart-analyst

Clone the repo

git clone --depth 1 https://github.com/mphinance/alpha-skills

Made for: Claude Code.

Or install quant-skills, the plugin that ships this one along with the rest of its 20 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/mphinance/alpha-skills/breadth-chart-analyst.svg)](https://agentmods.dev/skills/mphinance/alpha-skills/breadth-chart-analyst)

Your own site

<a href="https://agentmods.dev/skills/mphinance/alpha-skills/breadth-chart-analyst"><img src="https://agentmods.dev/badge/skills/mphinance/alpha-skills/breadth-chart-analyst.svg" alt="Measured on agentmods" height="20"></a>

Per session 107 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 7,758 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00107	$0.07758
Opus 5	$0.00053	$0.03879
Sonnet 5	$0.00021	$0.01552
Haiku 4.5	$0.00011	$0.00776

Measured 6d ago against content hash 61c09ae6e4cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

breadth-chart-analyst scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

The scan reads SKILL.md. This mod also ships 8 executable files (scripts/detect_breadth_values.py, scripts/detect_uptrend_ratio.py, scripts/extract_chart_right_edge.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

**PRIMARY data source**. Fetches market breadth, uptrend ratio, and sector summary data from public CSV sources. Uses only stdlib (urllib + csv) -- no external dependencies.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

breadth-chart-analyst — 100% identical, 6 lines differ

plugins/quant-skills/skills/breadth-chart-analyst/SKILL.md · 768 lines

How it starts

The opening of the file, as written. The whole thing — 768 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Breadth Chart Analyst

Overview

This skill enables specialized analysis of two complementary market breadth charts that provide strategic (medium to long-term) and tactical (short-term) market perspectives. Analyze breadth chart images to assess market health, identify trading signals based on backtested strategies, and develop positioning recommendations. All thinking and output are conducted exclusively in English.

When to Use

Use this skill when:

User provides S&P 500 Breadth Index (200-Day MA based) chart images for analysis
User provides US Stock Market Uptrend Stock Ratio chart images for analysis
User requests market breadth assessment or market health evaluation
User asks about medium-term strategic positioning based on breadth indicators
User needs short-term tactical timing signals for swing trading
User wants combined strategic and tactical market outlook
User requests breadth analysis WITHOUT providing chart images (CSV data mode)

Do NOT use this skill when:

User asks about individual stock analysis (use us-stock-analysis skill instead)
User needs sector rotation analysis without breadth charts (use sector-analyst skill instead)
User wants news-based market analysis (use market-news-analyst skill instead)

Prerequisites

Chart Images Optional: CSV data from public sources is the PRIMARY data source; chart images provide supplementary visual context
No API Keys Required: CSV data is fetched from public GitHub Pages; no external API subscriptions needed
Language: All analysis and output conducted in English

Output

This skill generates markdown analysis reports saved to the reports/ directory:

Chart 1 only: breadth_200ma_analysis_[YYYY-MM-DD].md
Chart 2 only: uptrend_ratio_analysis_[YYYY-MM-DD].md
Both charts: breadth_combined_analysis_[YYYY-MM-DD].md

Reports include executive summaries, current readings, signal identification, scenario analysis with probabilities, and actionable positioning recommendations for different trader types.

Read the full file on GitHub · 768 lines

Files

What ships with it

13 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

6d ago First seen · 768 lines · 107 tokens per session scan A 61c09ae6e4cc

Subscribe to this mod's changes

breadth-chart-analyst is a skill published in the GitHub repository mphinance/alpha-skills (19 stars, last pushed 8d ago), licensed MIT. It adds 107 tokens to every session and 7,758 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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breadth-chart-analyst