market-top-detector — Claude Code skill: what it does, how to install

---
name: market-top-detector
description: Assesses heuristic market top risk using O'Neil Distribution Days, Minervini Leading Stock Deterioration, and Monty Defensive Sector Rotation. Generates a 0-100 composite score with risk zone classification. Use when user asks about market top risk, distribution days, defensive rotation, leadership breakdown, or whether to reduce equity exposure. Focuses on 2-8 week tactical timing signals for 10-20% corrections.
---

# Market Top Detector Skill

## Purpose

Assess heuristic market top risk using a 6-component scoring system (0-100). Integrates three market risk methodologies:

1. **O'Neil** - Distribution Day accumulation (institutional selling)
2. **Minervini** - Leading stock deterioration pattern
3. **Monty** - Defensive sector rotation signal

Unlike the Bubble Detector (macro/multi-month evaluation), this skill focuses on **tactical 2-8 week timing signals** that precede 10-20% market corrections.

## Score interpretation

Treat the 0-100 composite as a **heuristic risk score**, not an estimated event
probability. A score of 70 does not mean a 70% chance of a top. Risk-budget
percentages are policy heuristics, not measured outcome frequencies.
Historical patterns are retrospective estimates, not point-in-time evidence.
Report **no comparable episode** when any component is unavailable/invalid or
nearest-pattern weighted RMS exceeds 15 points. This tolerance is a predeclared
heuristic, not an empirically validated similarity threshold.
Follow [the point-in-time evaluation protocol](references/point_in_time_evaluation.md)
before making calibration claims. No measured calibration results are supplied.

## When to Use This Skill

**English:**
- User asks "Is the market topping?" or "Are we near a top?"
- User notices distribution days accumulating
- User observes defensive sectors outperforming growth
- User sees leading stocks breaking down while indices hold
- User asks about reducing equity exposure timing
- User wants to assess correction risk for the next 2-8 weeks

**Japanese:**
- 「天井が近い？」「今は利確すべき？」
- ディストリビューションデーの蓄積を懸念
- ディフェンシブセクターがグロースをアウトパフォーム
- 先導株が崩れ始めているが指数はまだ持ちこたえている
- エクスポージャー縮小のタイミング判断
- 今後2〜8週間の調整リスクを評価したい

## Prerequisites

**Required:**
- **FMP API Key:** Set `$FMP_API_KEY` environment variable or pass `--api-key`. Free tier sufficient (~33 API calls per execution).
- **WebSearch Access:** Required to collect S&P 500 breadth (50DMA %) and CBOE Put/Call ratio data.

**Optional:**
- **Margin Debt Data:** Enhances sentiment scoring but typically 1-2 months lagged.
- **VIX Term Structure:** Auto-detected from FMP API if VIX3M quote available; manual override via `--vix-term`.

**Data Freshness:** All manually collected data should be from the most recent 3 business days for accurate analysis.

## Difference from Bubble Detector

| Aspect | Market Top Detector | Bubble Detector |
|--------|-------------------|-----------------|
| Timeframe | 2-8 weeks | Months to years |
| Target | 10-20% correction | Bubble collapse (30%+) |
| Methodology | O'Neil/Minervini/Monty | Minsky/Kindleberger |
| Data | Price/Volume + Breadth | Valuation + Sentiment + Social |
| Score Range | 0-100 composite | 0-15 points |

---

## Execution Workflow

### Phase 1: Data Collection via WebSearch

Before running the Python script, collect the following data using WebSearch.
**Data Freshness Requirement:** All data must be from the most recent 3 business days. Stale data degrades analysis quality.

```
1. S&P 500 Breadth (200DMA above %)
   AUTO-FETCHED from TraderMonty CSV (no WebSearch needed)
   The script fetches this automatically from GitHub Pages CSV data.
   Override: --breadth-200dma [VALUE] to use a manual value instead.
   Disable: --no-auto-breadth to skip auto-fetch entirely.

2. [REQUIRED] S&P 500 Breadth (50DMA above %)
   Valid range: 20-100
   Primary search: "S&P 500 percent stocks above 50 day moving average"
   Fallback: "market breadth 50dma site:barchart.com"
   Direct fallback when search snippets are poor: fetch `https://www.barchart.com/stocks/quotes/$S5FI/overview` and extract the embedded `lastPrice` / `tradeTime` for “S&P 500 Stocks Above 50-Day Average”.
   Record the data date

3. [REQUIRED] CBOE Equity Put/Call Ratio
   Valid range: 0.30-1.50
   Primary search: "CBOE equity put call ratio today"
   Fallback: "CBOE total put call ratio current"
   Fallback: "put call ratio site:cboe.com"
   Direct fallback when Cboe CSV endpoints are stale: fetch `https://ycharts.com/indicators/cboe_equity_put_call_ratio` and parse the “Last Value” / “Latest Period” table fields. Treat this as a secondary source and cite it in freshness notes.
   Record the data date

4. [OPTIONAL] VIX Term Structure
   Values: steep_contango / contango / flat / backwardation
   Primary search: "VIX VIX3M ratio term structure today"
   Fallback: "VIX futures term structure contango backwardation"
   Note: Auto-detected from FMP API if VIX3M quote available.
   CLI --vix-term overrides auto-detection.

5. [OPTIONAL] Margin Debt YoY %
   Primary search: "FINRA margin debt latest year over year percent"
   Fallback: "NYSE margin debt monthly"
   Note: Typically 1-2 months lagged. Record the reporting month.
```

### Phase 2: Execute Python Script

Run the script with collected data as CLI arguments:

```bash
python3 skills/market-top-detector/scripts/market_top_detector.py \
  --api-key $FMP_API_KEY \
  --breadth-50dma [VALUE] --breadth-50dma-date [YYYY-MM-DD] \
  --put-call [VALUE] --put-call-date [YYYY-MM-DD] \
  --vix-term [steep_contango|contango|flat|backwardation] \
  --margin-debt-yoy [VALUE] --margin-debt-date [YYYY-MM-DD] \
  --output-dir reports/ \
  --context "Consumer Confidence=[VALUE]" "Gold Price=[VALUE]"
# 200DMA breadth is auto-fetched from TraderMonty CSV.
# Override with --breadth-200dma [VALUE] if needed.
# Disable with --no-auto-breadth to skip auto-fetch.
```

The script will:
1. Fetch S&P 500, QQQ, VIX quotes and history from FMP API
2. Fetch Leading ETF (ARKK, WCLD, IGV, XBI, SOXX, SMH, KWEB, TAN) data
3. Fetch Sector ETF (XLU, XLP, XLV, VNQ, XLK, XLC, XLY) data
4. Calculate all 6 components
5. Generate composite score and reports

### Phase 3: Present Results

Present the generated Markdown report to the user, highlighting:
- Composite score and risk zone
- Data freshness warnings (if any data older than 3 days)
- Strongest warning signal (highest component score)
- Historical comparison (closest past top pattern)
- What-if scenarios (sensitivity to key changes)
- Recommended actions based on risk zone
- Follow-Through Day status (if applicable)
- Delta vs previous run (if prior report exists)

---

## 6-Component Scoring System

| # | Component | Weight | Data Source | Key Signal |
|---|-----------|--------|-------------|------------|
| 1 | Distribution Day Count | **25%** | FMP API | Institutional selling in last 25 trading days |
| 2 | Leading Stock Health | **20%** | FMP API | Growth ETF basket deterioration |
| 3 | Defensive Sector Rotation | **15%** | FMP API | Defensive vs Growth relative performance |
| 4 | Market Breadth Divergence | **15%** | Auto (CSV) + WebSearch | 200DMA (auto) / 50DMA (WebSearch) breadth vs index level |
| 5 | Index Technical Condition | **15%** | FMP API | MA structure, failed rallies, lower highs |
| 6 | Sentiment & Speculation | **10%** | FMP + WebSearch | VIX, Put/Call, term structure |

## Risk Zone Mapping

| Score | Zone | Risk Budget | Action |
|-------|------|-------------|--------|
| 0-20 | Green (Normal) | 100% | Normal operations |
| 21-40 | Yellow (Early Warning) | 80-90% | Tighten stops, reduce new entries |
| 41-60 | Orange (Elevated Risk) | 60-75% | Profit-taking on weak positions |
| 61-80 | Red (High Risk) | 40-55% | Aggressive profit-taking |
| 81-100 | Critical (Very High Risk) | 20-35% | Maximum defense, hedging |

---

## Exchange Calendar and Replay

Install `requirements.txt` before running the detector. Freshness uses XNYS
sessions rather than weekdays. `--as-of YYYY-MM-DD` is accepted for the live
evaluation date, but historical live replay fails closed because the current
quote endpoints are not point-in-time sources.

## API Requirements

**Required:** FMP API key (free tier sufficient: ~33 calls per execution)
**Optional:** WebSearch data for breadth and sentiment (improves accuracy)

## Output Files

- JSON: `market_top_YYYY-MM-DD_HHMMSS.json`
- Markdown: `market_top_YYYY-MM-DD_HHMMSS.md`

## Reference Documents

### `references/market_top_methodology.md`
- Full methodology with O'Neil, Minervini, and Monty frameworks
- Component scoring details and thresholds
- Historical validation notes

### `references/distribution_day_guide.md`
- Detailed O'Neil Distribution Day rules
- Stalling day identification
- Follow-Through Day (FTD) mechanics

### `references/historical_tops.md`
- Analysis of 2000, 2007, 2018, 2022 market tops
- Component score patterns during historical tops
- Lessons learned and retrospective illustrative estimates

### When to Load References
- **First use:** Load `market_top_methodology.md` for full framework understanding
- **Distribution day questions:** Load `distribution_day_guide.md`
- **Historical context:** Load `historical_tops.md`
- **Regular execution:** References not needed - script handles scoring