tracking-crypto-prices

# Tracking Crypto Prices ## Contents [Overview](#overview) | [Prerequisites](#prerequisites) | [Instructions](#instructions) | [Output](#output) | [Error Handling](#error-handling) | [Examples](#examples) | [Resources](#resources) ## Overview Foundation skill providing real-time and historical cryptocurrency price data for 10,000+ coins. This is the data layer for the crypto plugin ecosystem -- 10+ other skills depend on it for price information. ## Prerequisites 1. Install dependencies: `pip install requests pandas yfinance` 2. Optional: `pip install python-dotenv` for API key management 3. Optional: Get free API key from https://www.coingecko.com/en/api for higher rate limits 4. Add API key to `${CLAUDE_SKILL_DIR}/config/settings.yaml` or set `COINGECKO_API_KEY` env var ## Instructions 1. Check current prices for one or more symbols: ```bash python ${CLAUDE_SKILL_DIR}/scripts/price_tracker.py --symbol BTC python ${CLAUDE_SKILL_DIR}/scripts/price_tracker.py --symbols BTC,ETH,SOL ``` 2. Use watchlists to scan predefined groups (available: `top10`, `defi`, `layer2`, `stablecoins`, `memecoins`): ```bash python ${CLAUDE_SKILL_DIR}/scripts/price_tracker.py --watchlist top10 # Top 10 by market cap python ${CLAUDE_SKILL_DIR}/scripts/price_tracker.py --watchlist defi # DeFi tokens python ${CLAUDE_SKILL_DIR}/scripts/price_tracker.py --watchlist layer2 # Layer 2 tokens ``` 3. Fetch historical data by period or custom date range: ```bas...