The crypto fear and greed index condenses market and attention signals into a single score that runs from extreme fear to extreme greed. It describes mood, not direction, so use it as context for research rather than a trade instruction.
Daily reactions to the score are covered in crypto news today. This guide explains how the score is built, what its ranges mean and where it stops being useful.
How the index is calculated
The index is a sentiment indicator that combines market and attention signals into a 0–100 score. It is primarily based on Bitcoin market data, so it is a Bitcoin-centred read of market sentiment in crypto rather than a census of every token. The build runs in stages:
- Collect Bitcoin inputs. Price behaviour, trading activity, social engagement, market share and search interest are gathered as separate components.
- Compare with recent history. According to TrendSpider’s description of the data, volatility and momentum readings are compared against the corresponding averages of the last 30 days and 90 days.
- Apply weights. The components carry different weights, so a move in one input does not count the same as a move in another.
- Combine into one score. The weighted result becomes the 0–100 figure, where low values mean fear and high values mean greed.
Component weights at a glance
| Component | What it measures | Weight | Planning use |
|---|---|---|---|
| Volatility | Bitcoin volatility and maximum drawdown versus 30- and 90-day averages | 25% | Shows how turbulent price has been, not which way it is heading |
| Market momentum/volume | Latest Bitcoin momentum and trading volume versus the same averages | 25% | Largest share alongside volatility, so market activity drives much of the score |
| Social media | Bitcoin mentions, hashtags and likes | 15% | Higher engagement is read as greed; treat it as an attention gauge |
| Bitcoin dominance | Bitcoin’s share of total crypto market capitalisation | 10% | A modest input that ties the score to Bitcoin’s position in the wider market |
| Trends | Bitcoin search queries and volume from Google Trends | 10% | Captures public curiosity, which can lag or exaggerate price moves |
Weights are as listed in TrendSpider’s knowledge base, which sources the index from alternative.me.
Coinbase’s own description also names public sentiment among the inputs, next to volatility, market momentum and volume, dominance and trends, so weights and labels can vary slightly by how a platform summarises the method.
What each component tells you
Volatility
Volatility looks at how far and how fast Bitcoin has moved, along with its maximum drawdown, which is the decline in value from a peak. A sharp fall pushes the reading toward fear. The limitation is built into the measure: volatility measures price uncertainty, not price direction. A violent rally and a violent crash both register as turbulence, which is why this input should be read alongside momentum.
Market momentum and volume
Market momentum captures the latest Bitcoin market strength and trading volume against recent averages. Strong buying activity lifts the score toward greed, while thinning activity and falling prices pull it down. Because this input and volatility each carry 25%, price-derived data accounts for the largest part of the index. That makes the score more of a mirror of recent price action than an independent forecast of it.
Social media and search trends
Social media engagement, such as mentions, hashtags and likes for Bitcoin, supplies the attention side, with higher engagement read as greed. Search interest from Google Trends adds a second attention signal. Both reflect how many people are talking or looking, which usually rises after prices have already moved.
Bitcoin dominance
Bitcoin dominance is Bitcoin’s share of the combined crypto market capitalisation. It carries only a modest weight, but it anchors the index to Bitcoin’s role in the wider market. It is also a reminder that the index says more about Bitcoin than about smaller assets.
Score ranges and labels
The score runs from 0 (extreme fear) to 100 (extreme greed), a scale The Block describes as currently focused on Bitcoin. Providers publish slightly different label boundaries, so check which table a platform uses before comparing readings.
- Coinbase Learn bands. Coinbase categorises sentiment from extreme fear (0–24) to extreme greed (75–100).
- TrendSpider bands. TrendSpider lists Extreme Fear at 24 or below, Fear at 25–49, Neutral at 50, Greed at 51–74 and Extreme Greed at 75 or above.
The extreme zones agree across both lists. The middle is where labels matter least: a reading in the Fear or Greed bands is a mild tilt in mood, not a strong statement.
Extreme readings and their limits
Extreme labels attract attention, but they do not time reversals. A market can remain in extreme fear or extreme greed for weeks or even months, so acting the moment a threshold is crossed can mean being early by a long way. eToro frames the index as a way to add sentiment context to market research, not as a stand-alone signal or forecast.
Some publishers give a contrarian reading. The Block notes that a low value may indicate a buying opportunity, while a high value suggests a potential market correction. Coinbase is more cautious: the index should be used as a guide and not as a definitive predictor of market movements. The sensible position sits between the two: a low score marks stress worth examining, and a high score marks enthusiasm worth questioning. Neither confirms a turn.
Hype also attracts bad actors, and the score cannot vet any project or offer. For fraud patterns that tend to follow excitement, see crypto scams news.
Where the index is published
The index data comes from Alternative.me. TradingView’s version reflects historical data provided by AlternativeMe, and TrendSpider likewise names alternative.me as its vendor. Exchanges, data sites and charting platforms then re-publish the score, which is why the same reading appears in several places with different styling and, occasionally, different label boundaries.
How it differs from other sentiment measures
A pure social-media tracker measures only chatter, and a pure price indicator measures only the market. This index blends both: price-derived inputs such as volatility and momentum carry the largest weights, while social media and search trends carry smaller shares. That blend makes it a broad, readable gauge of market sentiment in crypto, but it also means it can echo price rather than lead it.
It also tracks Bitcoin rather than individual coins. For a single asset, such as Cardano’s token, pair the headline score with asset-specific coverage like ada news.
Frequently asked questions
How often does the index update?
The most widely referenced version updates daily, according to eToro. Coinbase describes it as often used as a daily indicator rather than a tool for long-term trading.
Does the index cover the whole crypto market?
Not directly. It is primarily based on Bitcoin market data, including Bitcoin’s share of total market capitalisation, so it reflects the wider market only through Bitcoin’s behaviour.
Do all platforms label the same score the same way?
Not exactly. Coinbase and TrendSpider agree on the extreme fear and extreme greed bands but describe the middle of the range differently, so check the platform’s own legend.
