How is the Fear and Greed Index calculated?

The Fear and Greed Index is an indicator that sums up market sentiment as a single number between 0 (extreme fear) and 100 (extreme greed). Its most widely used crypto version combines components such as volatility, momentum and trading volume, social media, Bitcoin dominance and search trends into a weighted average.

The idea comes from a similar sentiment index built for the stock market. The goal is to answer "how does the market feel?" with something measurable rather than a hunch. But a number read without knowing what it measures, and how, easily leads to the wrong conclusion.

The components

In the method published for the common crypto version, each component is first converted into its own score from 0 to 100, then multiplied by its weight and added up:

Weights and components can differ by provider, and different indexes with the same name may use different methods. The survey component may be paused at times; in that case the result is produced from the remaining components.

How each component is read

• Volatility: volatility and sharp drops running above normal count as signs of fear. Fast, unexpected price swings usually make investors nervous.
• Momentum and volume: heavy buying volume in a rising market scores toward greed. The logic is that people rush to buy at the same time, afraid of missing out.
• Social media: an unusually fast rise in crypto posts and interactions is read as growing interest and excitement.
• Bitcoin dominance: rising dominance counts toward fear; the assumption is that investors are leaving more speculative altcoins for Bitcoin, which is seen as relatively safe. Falling dominance is read as appetite flowing into altcoins, in other words greed.
• Search trends: these are read by their content. A rapid rise in anxious searches such as "bitcoin price manipulation" points to fear.

Components like volatility and momentum do not measure an absolute level; they measure the deviation from what has been normal in recent weeks. A 4% daily move might push the fear score up in a calm period but look ordinary in a turbulent one.

A hypothetical calculation

Suppose that on a hypothetical day the component scores are as follows and the survey component is switched off:

• Volatility: 30 points (weight 25)
• Momentum and volume: 70 points (weight 25)
• Social media: 60 points (weight 15)
• Bitcoin dominance: 40 points (weight 10)
• Search trends: 55 points (weight 10)

The weighted sum is 30×25 + 70×25 + 60×15 + 40×10 + 55×10 = 4,350. The remaining weights add up to 85, so if we assume the result is rescaled to that total, the index comes out at 4,350 ÷ 85 ≈ 51. That is a value around "neutral".

This example carries an important lesson: 51 does not describe a calm market. Volatility was on the fear side and momentum on the greed side; two strong, opposite signals cancelled each other out. A single number can hide the tug-of-war beneath it, so it pays to look at the components separately whenever possible.

How to read the index

As the value moves toward either end, the label changes: low values are called "extreme fear" and high values "extreme greed". The exact band boundaries can vary slightly between providers.

The most popular interpretation is contrarian and rests on a frequently quoted line attributed to Warren Buffett: "Be fearful when others are greedy, and greedy when others are fearful." In this view, extreme fear marks periods when selling may have gone too far, and extreme greed marks periods when the market has become fragile.

But this is an idea to be tested, not a rule. Points to keep in mind:

• The index is derived from price. Volatility and momentum are calculated from price movements in the first place. The index rises because the price rises; the price does not rise because the index does.
• Extremes can last. In a strong trend the index can stay in "extreme greed" for weeks. Acting on a contrarian reading too early can be costly.
• It updates slowly. Common versions are calculated once a day, so they reflect sharp intraday moves late.
• It is Bitcoin-centric. The common version relies largely on Bitcoin data and says little about any single altcoin.
• Social data is noisy. Bot accounts or a single viral event can distort the social component.

How to follow it in the Sezga terminal

The Fear and Greed Index can be followed in the Sezga terminal. Rather than reading it alone, placing it next to other data in the terminal tells you more:

• Funding rate and open interest: if the index is high and funding is clearly positive, greed may also be building up in leveraged long positions.
• Liquidation feed: during periods of extreme fear you can watch whether large long liquidations are coming through.
• Forecast ledger and control group: the built-in Fear contrarian strategy calls "up" when the index is at 30 or below and "down" when it is at 70 or above, and its 24-hour results are scored side by side with the Coin flip and Always up control groups. To test the question "what did the price do in the days after the index hit extreme fear?", you need to keep your own records.

Key takeaways

• The index compresses market sentiment into one number from 0 to 100; low values signal fear, high values greed.
• The common crypto version combines volatility, momentum and volume, social media, surveys, Bitcoin dominance and search trends in a weighted average.
• Volatility and momentum measure deviation from 30-day and 90-day averages, not absolute levels.
• A value that looks neutral can come from opposing signals cancelling out, so check the components.
• The contrarian reading is not a rule but an idea to test against your own data.