ta
ta is a small, dependency-free technical-analysis library shipped in three flavors: ta.js for Node and the browser, ta.py for Python, and ta.go for Go. Same indicators, same names, idiomatic to each runtime.
ta v2.0.0 ships ta.js, ta.py, and ta.go on the same major version, with the same indicator set audited end-to-end against textbook formulas and a comparative benchmark in each language. Pure-JS ta.js wins 66 of 67 cross-library cases at 100k bars; pure-Go ta.go wins or ties everything in its field. The Python story is more complicated, and the post is honest about why.
ta.js is my first open-source project — around a hundred indicator functions in JavaScript, first commit 2020-08-24, v1.17.0 shipped earlier this week. I started it because I needed the indicator functions for my own work anyway and writing each of them turned out to be the cleanest way to learn them. I published it because if anyone actually used it, they might open issues on the ones I had gotten wrong, and that scrutiny loop was cheaper than anything I could have built for myself.
