Stock Analyzer Skill - Technical Specification

[
  "analyze stock",           // Primary action
  "stock analysis",          // Alternative phrasing
  "technical analysis for",  // Domain-specific
  "RSI indicator",          // Specific indicator 1
  "MACD indicator",         // Specific indicator 2
  "Bollinger Bands",        // Specific indicator 3
  "buy signal for",         // Signal requests
  "sell signal for",        // Signal requests
  "compare stocks",         // Comparison action
  "stock comparison",       // Alternative
  "monitor stock",          // Monitoring action
  "track stock price",      // Tracking action
  "chart pattern",          // Pattern analysis
  "moving average for",     // Technical indicator
  "stock momentum"          // Momentum analysis
]

(?i)(analyze|analysis)\s+.*\s+(stock|stocks?|ticker|equity|equities)s?

(?i)(technical|chart)\s+(analysis|indicators?)\s+(for|of|on)

(?i)(RSI|MACD|Bollinger)\s+(for|of|indicator|analysis)

(?i)(buy|sell)\s+(signal|recommendation|suggestion)\s+(for|using)

(?i)(compare|comparison|rank)\s+.*\s+stocks?\s+(using|by|with)

(?i)(monitor|track|watch)\s+.*\s+(stock|ticker|price)s?

(?i)(moving average|momentum|volatility)\s+(for|of|analysis)

Comprehensive technical analysis tool for stocks and ETFs. Analyzes price movements,
volume patterns, and momentum indicators including RSI (Relative Strength Index),
MACD (Moving Average Convergence Divergence), Bollinger Bands, moving averages,
and chart patterns. Generates buy and sell signals based on technical indicators.
Compares multiple stocks for relative strength analysis. Monitors stock performance
and tracks price alerts. Perfect for traders needing technical analysis, chart
interpretation, momentum tracking, volatility assessment, and comparative stock
evaluation using proven technical analysis methods and trading indicators.

stock-analyzer-cskill/
├── .claude-plugin/
│   └── marketplace.json          # Activation & metadata
├── scripts/
│   ├── main.py                   # Orchestrator
│   ├── indicators/
│   │   ├── rsi.py               # RSI calculator
│   │   ├── macd.py              # MACD calculator
│   │   └── bollinger.py         # Bollinger Bands
│   ├── signals/
│   │   └── generator.py         # Signal generation logic
│   ├── data/
│   │   └── fetcher.py           # Data retrieval
│   └── utils/
│       └── validators.py        # Input validation
├── README.md                     # User documentation
├── SKILL.md                      # Technical specification (this file)
└── requirements.txt              # Dependencies

"""
Stock Analyzer - Technical Analysis Skill
Provides RSI, MACD, Bollinger Bands analysis and signal generation
"""

from typing import List, Dict, Optional
from .indicators import RSICalculator, MACDCalculator, BollingerCalculator
from .signals import SignalGenerator
from .data import DataFetcher

class StockAnalyzer:
    """Main orchestrator for technical analysis operations"""

    def __init__(self, config: Optional[Dict] = None):
        self.config = config or self._default_config()
        self.data_fetcher = DataFetcher(self.config['data_source'])
        self.signal_generator = SignalGenerator(self.config['signals'])

    def analyze(self, ticker: str, indicators: List[str], period: str = "1y"):
        """
        Perform technical analysis on a stock

        Args:
            ticker: Stock symbol (e.g., "AAPL")
            indicators: List of indicator names (e.g., ["RSI", "MACD"])
            period: Time period for analysis (default: "1y")

        Returns:
            Dict with indicator values, signals, and recommendations
        """
        # Fetch price data
        data = self.data_fetcher.get_data(ticker, period)

        # Calculate requested indicators
        results = {}
        for indicator in indicators:
            if indicator == "RSI":
                calc = RSICalculator(self.config['indicators']['RSI'])
                results['RSI'] = calc.calculate(data)
            elif indicator == "MACD":
                calc = MACDCalculator(self.config['indicators']['MACD'])
                results['MACD'] = calc.calculate(data)
            elif indicator == "Bollinger":
                calc = BollingerCalculator(self.config['indicators']['Bollinger'])
                results['Bollinger'] = calc.calculate(data)

        # Generate trading signals
        signal = self.signal_generator.generate(ticker, data, results)

        return {
            'ticker': ticker,
            'current_price': data['Close'].iloc[-1],
            'indicators': results,
            'signal': signal,
            'timestamp': data.index[-1]
        }

    def compare(self, tickers: List[str], rank_by: str = "momentum"):
        """Compare multiple stocks and rank by technical strength"""
        comparisons = []
        for ticker in tickers:
            analysis = self.analyze(ticker, ["RSI", "MACD"])
            comparisons.append({
                'ticker': ticker,
                'analysis': analysis,
                'score': self._calculate_score(analysis, rank_by)
            })

        # Sort by score (highest first)
        comparisons.sort(key=lambda x: x['score'], reverse=True)

        return {
            'ranked_stocks': comparisons,
            'method': rank_by,
            'timestamp': comparisons[0]['analysis']['timestamp']
        }

class SignalGenerator:
    """Generates trading signals from technical indicators"""

    def generate(self, ticker: str, data: pd.DataFrame, indicators: Dict):
        """
        Generate trading signal from indicator combination

        Strategy: Combined RSI + MACD approach
        - BUY: RSI < 50 and MACD bullish crossover
        - SELL: RSI > 70 and MACD bearish crossover
        - HOLD: Otherwise
        """
        rsi = indicators.get('RSI', {}).get('value')
        macd = indicators.get('MACD', {})

        signal = "HOLD"
        confidence = "low"
        reasoning = []

        # RSI analysis
        if rsi and rsi < 30:
            reasoning.append("RSI oversold (< 30)")
            signal = "BUY"
            confidence = "moderate"
        elif rsi and rsi > 70:
            reasoning.append("RSI overbought (> 70)")
            signal = "SELL"
            confidence = "moderate"

        # MACD analysis
        if macd.get('signal') == 'bullish_crossover':
            reasoning.append("MACD bullish crossover")
            if signal == "BUY":
                confidence = "high"
            else:
                signal = "BUY"

        return {
            'action': signal,
            'confidence': confidence,
            'reasoning': reasoning
        }

1. "Analyze AAPL stock using RSI indicator" → ✅
2. "What's the technical analysis for MSFT?" → ✅
3. "Show me MACD and Bollinger Bands for TSLA" → ✅
4. "Is there a buy signal for NVDA?" → ✅
5. "Compare AAPL vs MSFT using RSI" → ✅
6. "Track GOOGL stock price and alert me on RSI oversold" → ✅
7. "What's the moving average analysis for SPY?" → ✅
8. "Analyze chart patterns for AMD stock" → ✅
9. "Technical analysis of QQQ with buy/sell signals" → ✅
10. "Monitor stock AMZN for MACD crossover signals" → ✅
11. "Show me volatility and Bollinger Bands for NFLX" → ✅
12. "Rank these stocks by RSI: AAPL, MSFT, GOOGL" → ✅

1. "What's the P/E ratio of AAPL?" → ❌ (correctly did not activate)
2. "Latest news about TSLA?" → ❌ (correctly did not activate)
3. "How do stocks work?" → ❌ (correctly did not activate)
4. "Execute a buy order for NVDA" → ❌ (correctly did not activate)
5. "Fundamental analysis of MSFT" → ❌ (correctly did not activate)
6. "Options strategies for AAPL" → ❌ (correctly did not activate)
7. "Portfolio allocation advice" → ❌ (correctly did not activate)

# Data fetching
yfinance>=0.2.0

# Data processing
pandas>=2.0.0
numpy>=1.24.0

# Technical indicators
ta-lib>=0.4.0

# Optional: Advanced charting
matplotlib>=3.7.0