The Crypto Fear & Greed Index compresses five inputs — volatility, market momentum and volume, social-media activity, Bitcoin dominance and search trends — into a single 0–100 score. Low numbers mean fear is driving behavior; high numbers mean greed is.
Why traders watch the extremes. Readings under 20 have historically clustered near capitulation lows, and readings over 80 near euphoric tops. That is why many investors treat the index as a contrarian thermometer: when everyone is terrified, sellers are mostly done selling; when everyone is euphoric, buyers are mostly done buying.
The honest limits. The index is a snapshot of mood, not a prediction. It stayed in "extreme greed" for weeks during 2021's run-up, and anyone who sold at the first 80 print missed substantial upside. Likewise, "extreme fear" in a true bear market can persist for months. Sentiment tells you the crowd's position — it doesn't tell you when the crowd will be proven wrong.
A practical way to use it. Pair it with a plan you set in advance: for example, a DCA schedule that doesn't change, plus a rule like "review (not act) when the index crosses 20 or 80." Sentiment then becomes context for your decisions instead of the decision itself.
You can check the live score on our Fear & Greed Index page, compare today against last week, and embed the gauge on your own site for free.