{"adoption": {"forks": 522, "observed_at": "2026-08-28T04:06:51.384415+00:00", "stars": 2435}, "canonical_url": "https://ross.abutalabs.com/products/techanjs", "card": {"archived": false, "artifact_type": "library", "description": "A visual, technical analysis and charting (Candlestick, OHLC, indicators) library built on D3.", "domain": ["fintech", "data-visualization", "web-development"], "enriched": true, "function": ["data-visualization", "charts"], "health_score": 20, "homepage": "http://techanjs.org/", "language": "JavaScript", "license": "MIT", "license_family": "permissive", "maturity": "maintenance", "member_repos": ["andredumas/techan.js"], "name": "andredumas/techan.js", "platform": ["browser"], "pushed_at": "2020-10-02T06:48:35+00:00", "repo": "andredumas/techan.js", "stars": 2435, "tags": ["d3", "technical-analysis", "candlestick", "ohlc", "financial-charts", "stock-indicators", "trading", "nodejs"], "topics": [], "urls": [], "use_cases": ["render candlestick stock charts in the browser", "plot technical indicators like RSI and MACD on financial charts", "build interactive OHLC volume charts with D3", "draw trendlines and support/resistance lines on stock charts", "visualize live updating market data feeds", "add zooming and crosshair to financial charts"], "what_it_is": "TechanJS is a JavaScript library for visual technical analysis and financial charting built on D3. It renders interactive candlestick, OHLC, and volume charts with indicators like RSI, MACD, moving averages, and Ichimoku Cloud for modern and mobile browsers.", "when_to_avoid": ["you need a maintained library with recent releases and active support", "you want a full trading platform or backtesting engine rather than charting", "you prefer React or canvas-based charting libraries over D3/SVG"], "when_to_choose": ["you need D3-based interactive financial charts with built-in technical indicators", "you want lightweight browser charting for candlestick and OHLC data", "you need reusable chart components following the D3 chart API pattern"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/techanjs", "repo": "andredumas/techan.js", "role": "main", "score": 23}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T02:31:02.148280+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "51bf4d2d0deeee2ec02e06e7bf820ace1d6ee8b1598c8f5478b491f51cce807c", "fetched_at": "2026-08-28T04:06:51.384415+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andredumas/techan.js"}, {"content_hash": "2137284d8f1ed4bff5dde5f52d0e78f6c58a19233650ceda812b1d4d3266503a", "fetched_at": "2026-08-29T10:12:38.737016+00:00", "kind": "homepage", "missing": false, "url": "http://techanjs.org/"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T02:31:02.148280+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "51bf4d2d0deeee2ec02e06e7bf820ace1d6ee8b1598c8f5478b491f51cce807c", "fetched_at": "2026-08-28T04:06:51.384415+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andredumas/techan.js"}, {"content_hash": "2137284d8f1ed4bff5dde5f52d0e78f6c58a19233650ceda812b1d4d3266503a", "fetched_at": "2026-08-29T10:12:38.737016+00:00", "kind": "homepage", "missing": false, "url": "http://techanjs.org/"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T02:31:02.148280+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "51bf4d2d0deeee2ec02e06e7bf820ace1d6ee8b1598c8f5478b491f51cce807c", "fetched_at": "2026-08-28T04:06:51.384415+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andredumas/techan.js"}, {"content_hash": "2137284d8f1ed4bff5dde5f52d0e78f6c58a19233650ceda812b1d4d3266503a", "fetched_at": "2026-08-29T10:12:38.737016+00:00", "kind": "homepage", "missing": false, "url": "http://techanjs.org/"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T02:31:02.148280+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "51bf4d2d0deeee2ec02e06e7bf820ace1d6ee8b1598c8f5478b491f51cce807c", "fetched_at": "2026-08-28T04:06:51.384415+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andredumas/techan.js"}, {"content_hash": "2137284d8f1ed4bff5dde5f52d0e78f6c58a19233650ceda812b1d4d3266503a", "fetched_at": "2026-08-29T10:12:38.737016+00:00", "kind": "homepage", "missing": false, "url": "http://techanjs.org/"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T02:31:02.148280+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "51bf4d2d0deeee2ec02e06e7bf820ace1d6ee8b1598c8f5478b491f51cce807c", "fetched_at": "2026-08-28T04:06:51.384415+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andredumas/techan.js"}, {"content_hash": "2137284d8f1ed4bff5dde5f52d0e78f6c58a19233650ceda812b1d4d3266503a", "fetched_at": "2026-08-29T10:12:38.737016+00:00", "kind": "homepage", "missing": false, "url": "http://techanjs.org/"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T02:31:02.148280+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "51bf4d2d0deeee2ec02e06e7bf820ace1d6ee8b1598c8f5478b491f51cce807c", "fetched_at": "2026-08-28T04:06:51.384415+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andredumas/techan.js"}, {"content_hash": "2137284d8f1ed4bff5dde5f52d0e78f6c58a19233650ceda812b1d4d3266503a", "fetched_at": "2026-08-29T10:12:38.737016+00:00", "kind": "homepage", "missing": false, "url": "http://techanjs.org/"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:06:51.384415+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T02:31:02.148280+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "51bf4d2d0deeee2ec02e06e7bf820ace1d6ee8b1598c8f5478b491f51cce807c", "fetched_at": "2026-08-28T04:06:51.384415+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andredumas/techan.js"}, {"content_hash": "2137284d8f1ed4bff5dde5f52d0e78f6c58a19233650ceda812b1d4d3266503a", "fetched_at": "2026-08-29T10:12:38.737016+00:00", "kind": "homepage", "missing": false, "url": "http://techanjs.org/"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T02:31:02.148280+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "51bf4d2d0deeee2ec02e06e7bf820ace1d6ee8b1598c8f5478b491f51cce807c", "fetched_at": "2026-08-28T04:06:51.384415+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andredumas/techan.js"}, {"content_hash": "2137284d8f1ed4bff5dde5f52d0e78f6c58a19233650ceda812b1d4d3266503a", "fetched_at": "2026-08-29T10:12:38.737016+00:00", "kind": "homepage", "missing": false, "url": "http://techanjs.org/"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T02:31:02.148280+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "51bf4d2d0deeee2ec02e06e7bf820ace1d6ee8b1598c8f5478b491f51cce807c", "fetched_at": "2026-08-28T04:06:51.384415+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andredumas/techan.js"}, {"content_hash": "2137284d8f1ed4bff5dde5f52d0e78f6c58a19233650ceda812b1d4d3266503a", "fetched_at": "2026-08-29T10:12:38.737016+00:00", "kind": "homepage", "missing": false, "url": "http://techanjs.org/"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T02:31:02.148280+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "51bf4d2d0deeee2ec02e06e7bf820ace1d6ee8b1598c8f5478b491f51cce807c", "fetched_at": "2026-08-28T04:06:51.384415+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andredumas/techan.js"}, {"content_hash": "2137284d8f1ed4bff5dde5f52d0e78f6c58a19233650ceda812b1d4d3266503a", "fetched_at": "2026-08-29T10:12:38.737016+00:00", "kind": "homepage", "missing": false, "url": "http://techanjs.org/"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 0, "longevity": 100, "rhythm": 8}, "computed_at": "2026-09-02T17:46:02.011165+00:00", "flags": [], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 4480, "days_push": 2161, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 23, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}