Crypto Fear & Greed Index Tracker (Historical + Trend)

Crypto Fear & Greed Index API with Historical Data and Trend Analysis

Track the Alternative.me Crypto Fear & Greed Index — get today's sentiment score, full history since 2018 (3,100+ days), regime detection, streak counting, rolling averages, and optional Telegram alerts — all in under 5 seconds with no API key required.

Run with one click on Apify's fully managed cloud. No servers, no rate limits, no credential management.

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What Does This Actor Do?

The Crypto Fear & Greed Index Tracker fetches live and historical sentiment data from the Alternative.me public API and enriches it with regime analysis, trend direction, and optional BTC price correlation via CoinGecko. It returns a clean, structured dataset ready for trading bots, dashboards, quant backtests, and portfolio alert systems.

Each run delivers a time-series of daily index readings (value 0–100, classification, regime label, BTC price) plus a SUMMARY record in the Apify key-value store with current streak, 7-day and 30-day rolling averages, trend direction, and a full regime breakdown — no postprocessing required.

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Why Use This Actor?

• Contrarian trading signal: Extreme Fear readings (< 25) have historically coincided with Bitcoin market bottoms; Extreme Greed (> 75) often precedes sharp corrections.
• Quantitative backtesting: Access the complete Fear & Greed history from February 2018 — over 3,100 daily data points — for strategy development and validation.
• Regime-aware bots: Feed the current regime label (extreme_fear, fear, neutral, greed, extreme_greed) directly into trading algorithms to dynamically adjust position sizing.
• Real-time Telegram alerts: Set a custom threshold and receive an instant push notification when sentiment crosses it (e.g., "alert me when F&G drops below 20").
• Portfolio dashboards: Schedule daily runs on Apify to populate a live crypto sentiment dashboard without managing infrastructure.
• Mean-reversion timing: Streak length reveals how long the market has been in an extreme — extended streaks are statistically more likely to revert.

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How to Use This Actor

1. Open the actor on Apify and click Try for free.
2. Set daysBack to the number of historical days you want (default: 30; use 0 for the full history since 2018).
3. Toggle includeBtcCorrelation to also fetch BTC/USD daily prices alongside the index.
4. (Optional) Set alertThreshold, telegramBotToken, and telegramChatId to receive Telegram alerts when the index crosses a threshold.
5. Click Start — results appear in the dataset within seconds.
6. Integrate via the Apify API, webhooks, or schedule automated daily runs.

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Input

Parameter	Type	Default	Description
daysBack	Integer	30	Days of history to fetch. Set to 0 for the full history since Feb 2018 (~3,100+ days).
historyDays	Integer	—	Attach a compact history array (up to 365 days) to the current-day row. Useful for single-row API consumers.
includeBtcCorrelation	Boolean	true	Fetch BTC/USD daily price from CoinGecko and correlate with the F&G index across all rows.
includeBtcPrice	Boolean	false	Append the current BTC/USD spot price to the latest row only.
includeComponents	Boolean	false	Request sub-component fields (volatility, momentum, social, dominance, trends). Note: the Alternative.me public API does not expose individual components.
alertThreshold	Object	{}	Trigger Telegram alert on threshold cross. Example: {"below": 20} or {"above": 80}.
telegramBotToken	String	—	Telegram bot token (required for alerts).
telegramChatId	String	—	Telegram chat ID for alert delivery.

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Output

Results are written to the Apify dataset (one row per day) and a SUMMARY record is written to the key-value store.

Dataset row example:

[
  {
    "date": "2025-09-10",
    "timestamp": "2025-09-10T00:00:00+00:00",
    "value": 22,
    "regime": "extreme_fear",
    "classification": "Extreme Fear",
    "btc_price_usd": 54320.50
  },
  {
    "date": "2025-09-09",
    "timestamp": "2025-09-09T00:00:00+00:00",
    "value": 25,
    "regime": "fear",
    "classification": "Fear",
    "btc_price_usd": 55100.00
  }
]

SUMMARY record (key-value store):

{
  "current_value": 22,
  "current_regime": "extreme_fear",
  "streak_days": 4,
  "trend_7d": "deteriorating",
  "avg_7d": 28.4,
  "avg_30d": 41.2,
  "regime_breakdown": {
    "extreme_fear": 6,
    "fear": 12,
    "neutral": 8,
    "greed": 3,
    "extreme_greed": 1
  }
}

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Data Fields

Field	Type	Description
date	String	ISO 8601 date (YYYY-MM-DD)
timestamp	String	ISO 8601 datetime with UTC offset
value	Integer	Fear & Greed score, 0 (maximum fear) to 100 (maximum greed)
regime	String	Machine-readable label: extreme_fear, fear, neutral, greed, extreme_greed
classification	String	Human-readable label matching the Alternative.me display
btc_price_usd	Float	BTC/USD daily price (when includeBtcCorrelation is enabled)
streak_days	Integer	(SUMMARY) Consecutive days in the current regime
trend_7d	String	(SUMMARY) Sentiment trend vs. 7 days ago: improving, deteriorating, or stable
avg_7d	Float	(SUMMARY) Rolling 7-day average index value
avg_30d	Float	(SUMMARY) Rolling 30-day average index value
regime_breakdown	Object	(SUMMARY) Day-count per regime over the lookback window

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Cost Estimation

Pay-Per-Event pricing: $0.0005 per day of data returned.

Request	Days returned	Estimated cost
Default (30 days)	30	~$0.015
90-day lookback	90	~$0.045
1-year lookback	365	~$0.18
Full history (2018–present)	~3,100	~$1.55

Apify free-tier credits cover many runs. Typical run time is under 5 seconds.

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FAQ

Does this actor require an API key? No. Data is sourced from the Alternative.me Fear & Greed API and CoinGecko, both of which are free public endpoints with no authentication required.

How far back does the historical data go? Alternative.me provides daily Fear & Greed Index data starting from February 2018. Set daysBack: 0 to retrieve the complete history (3,100+ days as of 2025).

Can I schedule daily automated runs? Yes. Use Apify's built-in scheduler to run this actor once per day and always have fresh sentiment data. You can also trigger runs via the Apify API or webhooks and push results directly to your database.

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Disclaimer: The Fear & Greed Index is a sentiment indicator, not financial advice. Past correlations between extreme readings and price reversals do not guarantee future results. Always conduct your own research before making investment decisions.

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Related actors

• Fear & Greed Backtester — Backtest strategy rules against the historical fear/greed data this actor provides
• Crypto Market Fear Composite — Multi-signal fear composite to validate extremes detected by this actor
• Crypto News Aggregator — News sentiment to contextualize fear/greed index readings

Feedback

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