ta4j/ta4j
A Java library for technical analysis. observed · 2026-08-28
Health v2 · maintenance only
98/100
- Activity 99
- Release rhythm 97
- Longevity 100
Flags: no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 13
- age_days: 3275
- days_rel: 23
- days_push: 7
- n_releases_24m: 16
Adoption not part of the score
2482 stars · 803 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
ta4j is an open-source Java library for technical analysis of financial time series. It provides a typed, composable model of bars, indicators, rules, and strategies, plus backtesting with realistic execution costs and reusable live-trading logic.
Use cases
- backtest trading strategies in Java
- compute technical indicators like moving averages and RSI
- detect candlestick patterns in OHLCV data
- rank and tune many candidate trading strategies
- research walk-forward and parameter-optimized strategies
- reuse strategy logic in a live trading application
- analyze risk and return of trading rules
When to choose
- you are building trading or market-analysis tooling on the JVM
- you want reproducible backtests with explicit cost and execution assumptions
- you prefer a typed, composable Java API over Python or a proprietary DSL
- you need a broad catalog of indicators and candlestick patterns
When to avoid
- you need built-in broker connectivity or market data feeds
- your stack is Python or another non-JVM language
- you want a turnkey trading bot rather than a research library
- you require a license other than MIT for strict compliance review
Facets
library · maturity active
trading math data-science charts fintech developer-tools jvm cross-platform technical-analysis backtesting trading-strategies indicators stocks forex ohlcv cryptocurrency algorithms
2 sources
- readme: https://github.com/ta4j/ta4j · fetched 2026-08-28 · ec5b5cdef3e8
- homepage: http://www.ta4j.com · fetched 2026-08-29 · d9624e2be72e
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| ta4j/ta4j | main | 98 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem