I Built "Duolingo for Chart Reading" as a Solo Dev - Here's What I Learned

There are thousands of resources that teach you what a hammer candlestick looks like. Almost none of them make you actually practice spotting one in a real chart. Reading price action is a visual skill. You can't learn it from flashcards. You learn it the same way you learn to read sheet music or spot patterns in an X-ray - through repetition with real data. So I built CandleDojo . It gives you a real historical chart, you call the direction, and then the chart replays forward so you see what actually happened. How it works You see a frozen moment from a real BTC, ETH, or SOL chart You read the candles and call bullish or bearish The chart replays forward - instant feedback A belt system (white to black) tracks your progression across 3,700+ scenarios No sign-up required. You can start practicing immediately. The stack Layer Tool Framework Next.js 15 (App Router) Auth + DB Supabase (Postgres + RPC) Hosting Vercel Styling TailwindCSS Charts Hand-rolled HTML Canvas I didn't use a chartin