Fear & Greed Index

The Fear & Greed Index is a composite score, ranging from 0 to 100, meant to capture the overall emotional temperature of the crypto market at a given moment — extreme fear at the low end, extreme greed at the high end.

Rather than relying on a single input, the index typically blends several signals: recent price volatility and momentum, trading volume, social media sentiment, and survey data, among others, into one number that's easier to digest at a glance than any of those inputs alone. The underlying idea is behavioral: markets tend to overreact in both directions, with extreme fear often coinciding with capitulation-driven selling and extreme greed often coinciding with euphoric, momentum-chasing buying — both of which are, historically, more often followed by a reversal than a continuation, though this is a tendency, not a rule that holds every time.

This matters for anyone swapping or holding crypto because it offers a rough gauge for whether current sentiment is running hot or cold, which is useful context for keeping your own decisions in check. It works best as a check on emotional decision-making — noticing when you're tempted to sell because the index and the headlines are both screaming fear, or buy because everything feels unstoppably positive — rather than as a precise timing signal to trade directly against.

Zest's Fear & Greed tool, at /tools/fear-greed, shows the current reading along with recent history, refreshed roughly hourly, so you can see not just today's number but the trend leading up to it.

The index pairs naturally with a disciplined approach like dollar-cost averaging, which by design doesn't require reacting to sentiment swings one way or the other — you can watch the index for context without needing to act on every reading. It also tends to move alongside other market-wide signals: large sell-offs by whales can spike fear readings quickly, and shifts in market cap dominance often accompany the same underlying mood shifts the index is trying to capture. None of these tools predict the future on their own, but read together, they give a fuller picture of the market's current state than any single number.