Fear and Greed
Bitcoin
The Fear and Greed Index compresses several market-sentiment measures into a single reading from zero, extreme fear, to one hundred, extreme greed.
Why it matters
It states in one number what the crowd is feeling, which is information price alone does not carry — the same price can arrive with panic or with complacency behind it.
How it is built
A weighted blend of volatility, market momentum and volume, social media activity, Bitcoin dominance and search trends.
What to watch
Sustained extremes have historically clustered near turning points, because a crowd already fully fearful has little selling left to do and one already fully greedy has little buying left. It reads the market's mood, not its direction.