About this tool
What Is the Crypto Fear & Greed Index?
The Crypto Fear & Greed Index is a composite sentiment indicator that measures whether cryptocurrency markets are driven primarily by fear (pessimism, sell pressure) or greed (optimism, buy pressure). The index outputs a score from 0 (maximum fear) to 100 (maximum greed), with 50 representing neutral sentiment.
The concept derives from Warren Buffett's contrarian investing philosophy: "Be fearful when others are greedy, and greedy when others are fearful." While this tool does not predict price movements, extreme readings have historically correlated with market reversals.
How the Index Is Calculated
This calculator uses a balanced 4-factor model with equal weighting:
| Component | Weight | What It Measures |
|---|---|---|
| Volatility | 25% | Price swing magnitude. High volatility is inverted (fear signal) |
| Volume | 25% | Buying/selling pressure vs. 30-day average |
| Momentum | 25% | Price position relative to moving averages |
| Social Sentiment | 25% | Twitter/X, Reddit engagement and tone |
The volatility score is inverted because in crypto markets, high volatility typically accompanies panic selling and fear. The composite formula is:
Index = (100 - Volatility) × 0.25 + Volume × 0.25 + Momentum × 0.25 + Social × 0.25
Index Zones
| Score Range | Label | Typical Market Behavior |
|---|---|---|
| 0-24 | Extreme Fear | Panic selling, capitulation, historically strong buy signal |
| 25-46 | Fear | Cautious selling, accumulation by experienced investors |
| 47-54 | Neutral | Market indecision, consolidation, low volatility |
| 55-74 | Greed | Optimistic buying, FOMO building, risk increasing |
| 75-100 | Extreme Greed | Euphoria, overleveraging, historically strong sell signal |
Limitations
The Fear & Greed Index is a coincident and lagging indicator, not a predictive tool. Markets can remain in extreme fear or extreme greed for weeks or months before reversing. The index should not be used as a sole buy/sell signal — combine it with fundamental analysis, technical analysis, and risk management. Additionally, this calculator uses manually entered values rather than live market data, so the output reflects your assessment of current conditions.
Practical Usage Examples
Extreme Fear Scenario
Volatility: 90, Volume: 20, Momentum: 15, Social: 10
Index: 14/100 — Extreme Fear. Contrarian view: potential accumulation zone.Neutral Market
Volatility: 50, Volume: 50, Momentum: 50, Social: 50
Index: 50/100 — Neutral. Market is in consolidation.Step-by-Step Instructions
Step 1: Enter Volatility Score (0-100). A high score represents high market volatility (large price swings and drawdowns). In crypto markets, high volatility typically indicates fear.
Step 2: Enter Volume Score (0-100). A high score represents strong buying pressure relative to the 30-day average. High volume during uptrends suggests greed; low volume during downtrends suggests fear.
Step 3: Enter Momentum Score (0-100). A high score means the asset is trading above its 50-day and 200-day moving averages (bullish signal). Low scores indicate bearish momentum.
Step 4: Enter Social Sentiment (0-100). A high score reflects high social media activity and positive engagement (Twitter/X, Reddit). Extreme euphoria on social platforms often precedes corrections.
Step 5: Review the Index. The calculator weights all four factors equally (25% each) and outputs a composite 0-100 score with a sentiment label and contrarian perspective.
Core Benefits
Quantified Sentiment: Converts abstract market emotions into a concrete 0-100 numeric score with clear zone labels (Extreme Fear, Fear, Neutral, Greed, Extreme Greed).
Four-Factor Model: Weights volatility, volume, momentum, and social sentiment equally to provide a balanced macro perspective rather than relying on a single metric.
Contrarian Perspective: Each result includes a contrarian investing note — historically, extreme fear has correlated with accumulation opportunities, while extreme greed has preceded corrections.
Browser-Only Processing: All calculations run locally using JavaScript arithmetic. No API calls, no data transmission. Works offline after page load.
Frequently Asked Questions
It is a composite sentiment score from 0 (extreme fear) to 100 (extreme greed) that measures cryptocurrency market psychology. It combines volatility, trading volume, price momentum, and social media sentiment into a single number to help investors gauge overall market mood.
This calculator uses four equally weighted components: Volatility (25%) — measures price swing magnitude; Volume (25%) — measures buying/selling pressure; Momentum (25%) — tracks price relative to moving averages; Social Sentiment (25%) — tracks social media engagement and tone.
Historically, periods of extreme fear (0-24) have correlated with market bottoms and strong buying opportunities. However, this is a historical correlation, not a guarantee. Markets can stay in extreme fear for extended periods. Always assess fundamentals and manage risk appropriately.
The index is a sentiment indicator, not a price prediction tool. It works best as a supplementary data point alongside technical analysis, fundamental analysis, and risk management. Extreme readings (below 20 or above 80) tend to have stronger correlations with reversals than moderate readings.
The industry-standard index (published by alternative.me) updates daily using automated data feeds. This calculator lets you input your own assessment of current conditions for custom analysis. For live daily scores, check alternative.me/crypto/fear-and-greed-index/.
Extreme Greed (75-100) indicates markets are driven by euphoria, FOMO (fear of missing out), and overleveraging. Historically, these periods have preceded significant corrections. It is a signal to consider taking profits and reducing risk exposure, not a guarantee of an imminent crash.
In cryptocurrency markets, high volatility typically accompanies fear — sharp price drops, panic selling, and liquidation cascades. Low volatility typically indicates calm, confident markets (greed). By inverting the volatility score, high volatility correctly contributes to a lower (more fearful) index reading.
No. The index measures current sentiment, not future price movements. While extreme greed has historically preceded corrections, the timing is unpredictable — markets can remain in extreme greed for weeks or months. Use the index as one input among many, not as a crystal ball.
Social sentiment measures the volume and tone of cryptocurrency discussions on platforms like Twitter/X and Reddit. High social activity with positive sentiment indicates greed (FOMO). Low activity with negative sentiment indicates fear. In crypto, retail investor psychology heavily influences price action.
No. All calculations run in your browser using basic JavaScript arithmetic. Your input scores are not transmitted to any server, stored in any database, or shared with anyone. The tool works identically with or without an internet connection after loading.