Youth Investing Simulator

Progress

M3 of M16 done · now building: the paper trading simulator Level 0 · Built

Buy and sell real companies and index funds at real prices. Part of a share is fine, mistakes are free, and it's saved in your browser.

Move four sliders and watch what waiting five years costs you. The first thing every young investor should feel.

Twenty companies and index funds, with real closing prices and exchange rates. A robot refreshes them every night.

A 14-to-18 year old who has heard "invest early" but has never seen what it does.
Someone who wants to make mistakes with money that costs nothing.
A teacher or club who needs a safe way to teach investing in one lesson.

M3 · Real market data, refreshed by itself 12 October 2026 · checked 19 October
Exchange rates and 20 instruments with real closing prices, fetched nightly by a GitHub Action. The API key lives in GitHub Secrets, never in the code. It then ran six nights in a row on its own, with nobody touching it.
M2 · Compound interest calculator 12 October 2026
Sliders for your plan, a growth chart, and the cost of waiting five years. The maths sits in its own file with five tests that run from the terminal.
M1 · Repo and live link 12 October 2026
Project set up and this page put on the internet. One link that never changes, live on GitHub Pages.