Reference · v0.13.1
697 zero-dependency TypeScript implementations. Plain arrays and objects in, plain values out — no client to construct, no API key, no provider baked in.
Writing this code with an agent? One command teaches it all
697 — npx skills add IslamBaraka90/Fintech-Algorithms-Library
Every algorithm has a page: signature, parameter contract, an executed worked example, diagrams and citations.
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Reference pages state a contract. These explain the subject — what the problem is, why the standard approaches exist, and where each one quietly breaks.
Why an unadjusted price series is wrong, and the order adjustments have to be applied in.
D03An index is a divisor with marketing attached. Everything else is maintenance.
D11How orders become prices, and what the spread actually costs you.
D01Turning a raw tape into something you can compute on without lying to yourself.
D04The index went up. Did the market? Counting participants instead of watching price.
697 of 697 pages show a worked example, and not one of them was typed by hand. Each is either the fixture the test suite asserts, or the real return value captured by running the function on the input its own test provides.
No HTTP client, no vendor SDK, no node:fs, zero runtime dependencies.
You write one adapter from your provider's payload and own it; when the vendor changes
their API you edit that file and the algorithms never move.
The package ships an agent skill, so Claude Code, Codex, Cursor and the rest work from the real import paths, warm-up counts and verification tiers instead of guessing at them. It bundles a lookup script that answers from the payload you have installed, offline.
npx skills add IslamBaraka90/Fintech-Algorithms-Library