Sentiment Indicators for Crypto Trading (2)

Sentiment Indicators for Crypto Trading

2 sentiment indicators, from the AlgoBrain wiki. The crowd's mood: fear & greed, social and news sentiment, and positioning extremes. Each lists what it measures, the strategies that use it, the Crypto Data API endpoints that serve it or its inputs, and a prompt for an AI agent to compute it. All of them are in the API: GET /api/v1/indicators/catalog?group=sentiment.

Every Sentiment indicator

Crypto Fear & Greed Index #

Crypto F&G IndexFear and Greed IndexAlternative.me Fear & Greed

The Crypto Fear & Greed Index is a daily composite sentiment indicator published by Alternative.me that aggregates multiple market signals into a single 0–100 score: 0 = "Extreme Fear," 100 = "Extreme Greed." It was first published in 2018 and tracks the emotional state of the crypto market, functioning as a contrarian regime gauge — extreme fear historically precedes reversals, extreme greed prec

Used by Complacency Vol Buying Contrarian Extremes DeFi Yield / LP × Sentiment-Extreme Filter On-Chain Capitulation Confluence Post-Panic Vol Selling Put-Protected Dip Buying Sentiment-Positioning Divergence Sentiment Trading

CDA endpoints/api/v1/sentiment/fear-greed/api/v1/market-intelligence/fear-greed-history/api/v1/news/pulse

Via API/api/v1/indicators/catalog/crypto-fear-and-greed-index

AI-agent prompt

Compute it with an AI agent

Compute the Crypto Fear & Greed Index for BTC, ETH and SOL using the CryptoDataAPI (X-API-Key header).

1. Definition and parameters: GET https://cryptodataapi.com/api/v1/algobrain/page?path=wiki/concepts/crypto-fear-and-greed-index.md
2. Inputs:
- GET https://cryptodataapi.com/api/v1/sentiment/fear-greed
- GET https://cryptodataapi.com/api/v1/market-intelligence/fear-greed-history
- GET https://cryptodataapi.com/api/v1/news/pulse
3. Pinned: 4h bars, 500-bar lookback, the playbook's default parameters. Return the latest value, its 30-day percentile, and a one-line read of what it says now. Research only.

Sentiment Analysis #

Market Sentiment

Sentiment analysis in trading is the practice of measuring the collective mood, positioning, and expectations of market participants. It serves as both a confirming indicator (trending sentiment aligns with price) and a powerful contrarian signal (extreme sentiment often marks turning points).

Used by A building block; no catalogue strategy declares it directly.

CDA endpoints/api/v1/sentiment/fear-greed/api/v1/market-intelligence/fear-greed-history/api/v1/news/pulse

Via API/api/v1/indicators/catalog/sentiment-analysis

AI-agent prompt

Compute it with an AI agent

Compute the Sentiment Analysis for BTC, ETH and SOL using the CryptoDataAPI (X-API-Key header).

1. Definition and parameters: GET https://cryptodataapi.com/api/v1/algobrain/page?path=wiki/concepts/indicators/sentiment-analysis.md
2. Inputs:
- GET https://cryptodataapi.com/api/v1/sentiment/fear-greed
- GET https://cryptodataapi.com/api/v1/market-intelligence/fear-greed-history
- GET https://cryptodataapi.com/api/v1/news/pulse
3. Pinned: 4h bars, 500-bar lookback, the playbook's default parameters. Return the latest value, its 30-day percentile, and a one-line read of what it says now. Research only.

Get these indicators from the API

curl -H "X-API-Key: cdk_live_yourkey" \ "https://cryptodataapi.com/api/v1/indicators/catalog?group=sentiment" curl -H "X-API-Key: cdk_live_yourkey" \ "https://cryptodataapi.com/api/v1/indicators/catalog/crypto-fear-and-greed-index"

Any key works, Free included — mint one in a single call. The list endpoint returns summaries; the per-slug endpoint adds the prompts. Full playbooks come from /api/v1/algobrain/page?path=… using each entry's wiki_path. Or use the MCP server.

What are sentiment indicators?

The crowd's mood: fear & greed, social and news sentiment, and positioning extremes.

Which sentiment indicators are covered?

2: Crypto Fear & Greed Index, Sentiment Analysis.

Where do I get sentiment data for crypto?

From these Crypto Data API endpoints: /api/v1/sentiment/fear-greed, /api/v1/market-intelligence/fear-greed-history, /api/v1/news/pulse.

Can an AI agent compute these indicators?

Yes. GET /api/v1/indicators/catalog/{slug} returns a prompt naming the endpoints to call and the parameters to pin. Any API key works, Free included.

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