The Crypto Fear and Greed Index is a daily sentiment score from 0 to 100. A low number means the market is fearful. A high number means it is greedy. The best-known version is published by Alternative.me, which also documents how the score is built. The idea comes from the stock market: investors tend to sell too much when they are scared and buy too much when they are confident.
How the Index Is Calculated
The Alternative.me index is based on Bitcoin data and combines several inputs, each with a fixed weight:
- Volatility (25%): current volatility and drawdowns compared with 30-day and 90-day averages. Unusual volatility is read as fear.
- Market momentum and volume (25%): current volume and momentum against recent averages. Heavy buying volume in a rising market is read as greed.
- Social media (15%): the rate and volume of Bitcoin-related posts and interactions.
- Surveys (15%): weekly polls of market participants. The publisher lists this input as paused.
- Bitcoin dominance (10%): a rising share for Bitcoin suggests a move to relative safety, while a falling share suggests appetite for riskier altcoins.
- Google Trends (10%): changes in search terms. A jump in searches such as "bitcoin price manipulation" signals fear.
Reading the Scale
- 0 to 24: Extreme Fear
- 25 to 44: Fear
- 45 to 55: Neutral
- 56 to 74: Greed
- 75 to 100: Extreme Greed
The exact band edges are approximate, since the publisher labels each daily value without listing fixed cutoffs.
A single reading says little. The useful information is in how long the index stays in an extreme zone and how the price behaves while it is there.
What History Shows
Extreme readings have lined up with several major turning points. In June 2022, after the Terra collapse and the Celsius withdrawal freeze, the index fell into single digits while Bitcoin traded near $20,000. In March 2024, as Bitcoin set a new high above $73,000 following the launch of US spot ETFs, the index reached around 90.
The pattern is not a timing tool. In 2022 the index sat in Extreme Fear for weeks, and the final low in price came months later, in November, after the FTX failure. During strong bull runs the index can stay in Greed or Extreme Greed for a long time while the price keeps rising. Extremes mark zones of higher risk or opportunity, not exact tops and bottoms.
Why Sentiment Works as a Contrarian Signal
Markets move on positioning. When nearly everyone who wants to buy has bought, and many have borrowed to do it, there are few buyers left and a small drop can trigger forced selling. When most weak holders have already sold in a panic, selling pressure runs out. A sentiment index is a rough way to measure how crowded one side has become.
This is the logic behind the well-known Warren Buffett line about being fearful when others are greedy and greedy when others are fearful. It is a sound principle, but it needs patience. Crowded markets can stay crowded.
Limits of the Index
- It is built on Bitcoin. It says little about a specific altcoin or sector.
- It reacts to price. Half of the weight comes from volatility and momentum, so it often confirms a move that has already happened.
- Social data can be distorted by bots and coordinated campaigns.
- The methodology has changed over time, so old and new readings are not perfectly comparable.
- It ignores macro factors such as interest rates and liquidity, which drive crypto prices over longer periods.
Other Sentiment Gauges
Sentiment is easier to trust when several independent measures agree.
- Funding rates: on perpetual futures, a high positive rate means traders are paying a premium to hold long positions, a sign of crowded bullish bets.
- Open interest: fast growth in open futures positions alongside rising prices points to more borrowed money in the market.
- Options skew and put/call ratio: these show whether traders are paying more for downside protection or for upside bets.
- Exchange flows: coins moving onto exchanges can signal intent to sell. Coins moving off exchanges suggest holding.
- Stablecoin supply: growing stablecoin balances represent buying power waiting on the sidelines.
A Practical Way to Use It
Treat the index as a check on your own behavior before you treat it as a signal.
- In Extreme Greed, review position sizes and borrowed exposure. Avoid adding large positions only because the price is rising.
- In Extreme Fear, avoid panic selling a position you planned to hold. If you buy regularly, keep the schedule.
- Look for agreement. Extreme Fear combined with large holders moving coins off exchanges is more meaningful than either sign alone.
- Write your rules down before the market gets emotional. Decisions made in advance are easier to follow.
Nothing in this article is financial advice. Sentiment readings describe the crowd and do not predict prices.
Track on CoinMarketGuy
The CoinMarketGuy homepage shows the current Fear and Greed reading next to total market cap and volume, so you can see sentiment and price together. For a view of where attention is moving, the trending page shows the most searched coins.