What is the Fear & Greed Index?
The Bitcoin Fear & Greed Index is a daily sentiment score published by Alternative.me. It runs from 0 (Extreme Fear) to 100 (Extreme Greed) and updates once per day.
A low score means most of the market is nervous and selling. A high score means buyers are piling in with heavy confidence. Crowd emotions tend to overshoot in both directions, and tracking those swings can sharpen your timing.
Why It Matters
Contrarian buyers pay close attention to this index. Extreme Fear readings follow sharp drops, when most of the market has turned pessimistic. Historically, those periods have lined up with strong buying opportunities. During the March 2020 COVID crash, the index fell into single digits. Bitcoin recovered within months and went on to set new highs.
Extreme Greed readings tend to cluster near market tops, when buyers are overconfident. Prices can keep climbing during greed phases, but your risk of a pullback grows with each step higher.
The index works best alongside other data: on-chain metrics, volatility readings, and broader market analysis. On its own, it is a sentiment gauge, not a buy or sell signal.
How It Works
The index pulls data from six sources, each with a fixed weight in the final score:
- Volatility (25%): Compares current Bitcoin volatility and drawdowns against 30- and 90-day averages. Unusually high volatility pushes the score toward fear.
- Market Momentum & Volume (25%): Looks at buying volume and upward momentum relative to recent averages. Strong momentum shifts the score toward greed.
- Social Media (15%): Tracks the volume and speed of Bitcoin-related posts. A spike in social chatter can signal growing greed.
- Surveys (15%): Polls a broad sample of investors about their market outlook. (This component has been paused at times.)
- Bitcoin Dominance (10%): Measures Bitcoin's share of total crypto market cap. Rising dominance can indicate fear as investors move away from riskier altcoins.
- Google Trends (10%): Analyzes search volume for Bitcoin-related queries. Certain search patterns correlate with fearful or greedy behavior.
The combined score falls into five bands: 0 to 25 is Extreme Fear, 26 to 46 is Fear, 47 to 54 is Neutral, 55 to 75 is Greed, and 76 to 100 is Extreme Greed.
If you HODL through full market cycles, the index serves as a useful check on crowd behavior. When panic dominates and your time horizon stretches years out, a low reading can steady your hand. When greed spikes, you might want to pause and size up your exposure.