The Crypto Fear & Greed Index Explained

6 min read · Last updated March 2026

Warren Buffett famously said: "Be fearful when others are greedy, and greedy when others are fearful." The Fear & Greed Index turns this principle into a measurable number.

What Is It?

The Crypto Fear & Greed Index is a daily metric that scores market sentiment from 0 (extreme fear) to 100 (extreme greed). It was created by Alternative.me and has become one of the most watched sentiment indicators in crypto.

0-25 Extreme Fear

26-40 Fear

41-60 Neutral

61-75 Greed

76-100 Extreme Greed

How Is It Calculated?

The index combines six data sources, each weighted differently: volatility (25%) — higher volatility signals fear; market momentum and volume (25%) — strong buying = greed; social media (15%) — sentiment analysis of crypto-related posts; surveys (15%) — polling crypto users; Bitcoin dominance (10%) — rising dominance signals fear; Google Trends (10%) — search volume for Bitcoin-related terms.

What Does It Tell You?

Extreme Fear (0-25): Most people are scared and selling. Markets have crashed or are crashing. Historically, this is when the best buying opportunities appear — but it's also when buying feels the most uncomfortable.

Fear (26-40): The market is cautious. Prices may still be falling, but the panic is subsiding. This zone often appears during the early stages of recovery.

Neutral (41-60): Balanced sentiment. The market could go either way. This is a wait-and-see zone.

Greed (61-75): Optimism is building. Prices are rising. People are making money and talking about it. Risk is starting to accumulate.

Extreme Greed (76-100): Euphoria. Everyone thinks prices will keep going up forever. This is historically when the market is most likely to correct. It's the worst time to make a large new investment.

The paradox: The index is most useful precisely when it feels wrong. When it reads "extreme fear" and your instinct says "stay away," that's when history says buying offers the best long-term value. When it reads "extreme greed" and you want to buy more, that's when caution is warranted.

How We Use It

In our BTC Cycle Indicator, the Fear & Greed Index is one of four metrics that contribute to the composite score. It accounts for 25% of the total, alongside the 200-day moving average (35%), funding rates (15%), and BTC dominance (25%).

We don't rely on Fear & Greed alone because sentiment can be misleading in isolation. A market can be fearful for good reasons (a genuine structural problem) or for temporary reasons (a short-term panic). By combining it with on-chain and technical data, we get a more complete picture.

Key Historical Readings

The lowest readings in Bitcoin's history came during moments of maximum despair: a reading of 5 during the FTX collapse (November 2022), 8 during the COVID crash (March 2020), and 10 during the 2018 bear market bottom. In every case, these extreme lows preceded major recoveries.

The highest readings — above 80 — have appeared during Bitcoin's euphoric tops: the April 2021 Coinbase IPO peak, the November 2021 $69K all-time high, and the March 2024 ETF-driven rally. Each was followed by significant corrections.