The Fear & Greed index
The crypto Fear & Greed index, popularized in this market by the Alternative.me series (itself inspired by earlier financial-market “fear and greed” scores), is a single number, usually from 0 to 100, with labels such as “extreme fear,” “fear,” “neutral,” “greed,” and “extreme greed.” This site shows a cached copy of that public index when the feed is available.
A single number is easy to read and easy to misuse. This guide explains what the index is trying to do, what typically goes into it, and why it is a descriptive sentiment snapshot — not a timing tool and not financial advice.
What the number is for
Sentiment indicators try to summarize whether participants look cautious or enthusiastic. The usual editorial claim, inherited from older market adages, is that extreme fear can coincide with washed-out conditions and extreme greed with crowded optimism. Sometimes that pattern appears in hindsight. Sometimes the index can sit at an extreme for a long time while price continues in the same direction. “The crowd is greedy” can be early, late, or simply unhelpful.
Use the index, if you use it at all, as one context label: this is how this particular recipe classified recent conditions. Do not treat a move from 40 to 45, or a single daily print, as an event that requires a trade. A dashboard widget is not a process.
Typical ingredients
Alternative.me has publicly described a mix of inputs that can include, among other things:
- Price momentum and volatility relative to recent history,
- Survey or social-volume style measures,
- Market-cap dominance (for example, whether Bitcoin’s share is rising or falling),
- Trends such as search interest,
- other available market statistics.
Weights and recipes can change. If you need an authoritative list, read the publisher’s current methodology, not a second-hand summary. Different “fear and greed” products in traditional markets (for example, CNN’s older stock-market index) use different ingredients again — put/call ratios, junk-bond demand, and so on — and are not interchangeable with the crypto version.
Because several inputs are themselves lagging or based on price, the index often moves with the market. After a sharp drop, “fear” rises; after a run-up, “greed” rises. That can be informative as a recap and circular as a forecast. If bitcoin has already fallen hard, you do not need an index to tell you that the recent tape looked fearful. The index is a compression of that story, not an independent oracle.
How to read it alongside other context
If you glance at the index, pair it with things it does not contain:
- The economic calendar (a CPI or central-bank decision can change volatility after a “neutral” print).
- Funding rates and open interest, which speak to leveraged positioning rather than to a blended sentiment score.
- Liquidity and session, which affect how meaningful a day’s move is.
- Your own horizon. A daily sentiment label is a poor match for a five-minute scalp and an incomplete match for a multi-month investment decision.
On this site, Bitcoin dominance is shown next to Fear & Greed because both are widely watched context numbers. Dominance rising can mean Bitcoin is outperforming other coins, or that other coins are falling faster; it does not, by itself, diagnose “greed” or “fear.” A week of rising dominance and falling prices is a different market than a week of rising dominance and rising prices.
Failure modes
- Over-fitting stories: people remember the times extreme fear preceded a bounce and forget the times it preceded another decline.
- False precision: the difference between 28 and 32 is not a scientifically distinct regime.
- Stale or missing inputs: if a social or survey feed is down, the recipe may degrade.
- Different audiences: retail social sentiment and derivatives positioning can diverge. The index is not a census of every desk.
- Changing methodology: if inputs or weights change, historical comparisons get messier, even if the 0–100 scale looks the same.
A healthier use is archival and educational: “last week the index moved from greed toward fear as prices fell and volatility rose.” That is a description. Decisions about money require far more than a gauge on a dashboard, and many people would be better served by not making short-term decisions at all.
If you keep a journal, recording the index next to your own behaviour — did you chase, flatten, or over-trade? — can be more useful than trying to “fade” a label. The index will not manage your risk for you. See Risk management and Reading funding rates for related mechanics.
This article is for information only and is not financial, investment, or trading advice. Sentiment indicators can stay at extremes, and trading crypto can result in the loss of capital.