In the cryptocurrency market, price fluctuations are influenced not only by fundamentals but also deeply driven by investor psychology. When the market rises, people experience FOMO (fear of missing out) due to greed; when the market falls, they irrationally sell due to fear. The Fear & Greed Index (FGI) is a tool designed to quantify these irrational emotions.

1. What is the Fear & Greed Index?

The Fear & Greed Index is a comprehensive quantitative indicator that measures the sentiment of Bitcoin and the cryptocurrency market. It generates a value from 0 to 100 by analyzing dimensions such as volatility, market trading volume, social media popularity, market share, and search trends.

Core Assumptions:

 

• Extreme fear may signal that investors are overly worried, which usually indicates that assets are oversold and may present a potential buying opportunity.
• Extreme greed means that investor sentiment is overheated, and the market faces risk of a correction due to bubble accumulation.

2. Numerical Definition and Market Implications

The index categorizes market conditions into five levels, with each level corresponding to a different operational environment:

3. Software Operations: How to Efficiently Use FGI

To turn sentiment analysis into real returns, you can utilize the following features offered by the software for precise operations:

1. Quick View of the Index

Keeping real-time track of market temperature is the first step in trading.

 

• Access Path: Click [Index] — [Fear & Greed Index] in the navigation bar.
• Quick Search: Directly enter the keyword “fear” or “FGI” in the search box to switch to the index.

2. Set Intelligent Alerts (Threshold Reminders)

No need to watch the market all the time; let the system monitor extreme emotions for you.

 

• Operation: Click “Add Alert” on the index interface and set thresholds based on personal style.
• Recommendation: Set reminders for “Index < 20” (catch extreme panic) and “Index > 80” (beware of extreme greed risk).

3. Comparison of the Index and K-line Trends

Overlapping analysis of changes in sentiment with price fluctuations can help identify market tops and bottoms more clearly.

• Operation: Open the K-line chart of the cryptocurrency — Click [Indicator Library] — [Market Index] — [Add to K-line].

• Trend Correlation Analysis: Observe the comparison chart below:

Red - Top: In March 2024 and December 2025, when the index repeatedly surged into the “extreme greed” zone above 80, the BTC price was at a stage high. Subsequently, the index fell back, and prices showed a significant correction.

Green - Bottom: Whenever the panic value drops into the “extreme fear” zone below 20 (such as in August 2024 and March 2025), the BTC price curve usually sees a rebound or horizontal base forming.

4. Custom Strategy Writing

Advanced traders can incorporate FGI into quantitative scripts for automated alerts.

• Logic Example:

Entry Point: When the index crosses above 20 (indicating the extreme panic sentiment is beginning to recover), trigger a buy signal.

Exit Point: When the index crosses below 80 (indicating extreme greed sentiment is beginning to cool down), trigger a sell alert.

4. Trading Advice and Risk Warnings

 

• Contrarian Thinking, Follow the Trend: The index has strong contrarian value in extreme ranges (<20 or >80), but in the neutral range of 40-60, prices are more influenced by technical and news factors.
• Avoid Sole Dependence on a Single Indicator: The Fear & Greed Index reflects “emotions” rather than “fundamentals.” In a strong bull market, the index may remain above 70 for a long time; in an extreme bear market, it may also oscillate at low levels for an extended period.
• Combination Strategy: It is recommended to use FGI in conjunction with RSI (Relative Strength Index) or MACD. When sentiment is in “extreme fear” and technical indicators show “oversold,” the entry success rate is highest.

Investment is a game against human nature. The greatest significance of the Fear & Greed Index is that it can provide you with a warning in numbers when others are crazy and give you courage when others are desperate.

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