Does the Crypto Fear & Greed Index work?
Quick answer
No, not in our tests. We tested 4 Fear & Greed rules on real price history, each with its pass bar written before we looked: 0 passed, 2 failed and 2 were mixed or studies.
4 tests0 passed
2 failed2 mixed or studies
What it means for you
Buying fear and greed: what this family of tests supports, in plain moves. Information only, not financial advice.
- A scary day was not a discount by itself. The Fear & Greed index measured mood, and mood told us little about the next months.
- If you buy on fear, buy the plan, not the mood: a fixed schedule did the same job without the guessing.
- Greed readings were no reliable sell signal either. Trend rules (below) did that job better.
Keeping what you have matters more than any rule: the few tools we would use.
All 4 tests, passed first
FAILEDOct 27, 2026
No. Buying when Fear & Greed crossed above 50 did worse than an average day (1.5% less gain). Full result →
FAILEDOct 23, 2026
Is buying in Extreme Fear worse than buying on any day? (255 coins, judged 30/90/180/365 days later)
On the four test coins, buying in Extreme Fear did worse 90 days later in every cycle, but across 255 coins fear days were slightly better (3.3%). Full result →
MIXEDOct 27, 2026
Partly. Extreme Greed was a warning sign on the four test coins (7.3% less gain), but not across all coins over all history. Full result →
STUDYOct 25, 2026
On 12 of today's 13 most-traded coins with enough history, buying 90 days after Extreme Fear did worse than buying on any day. Full result →
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Tested on past prices with no fees unless stated; the past is no promise. Information only, not financial advice. Every test on one page →