I built my own zero-dependency financial chart engine with Canvas

If you've ever tried building a trading dashboard or a crypto app, you know the drill:

TradingView Charting Library: Powerful, but the advanced version requires strict approval, business verification, and mandatory branding.

Enterprise solutions (like AG Charts / SciChart): Insanely expensive for solo devs and indie hackers just bootstrapping an MVP.

Lightweight options: Often lack smooth interactions, custom indicator layers, or flexible drawing capabilities.

A while ago, I ran into this exact wall while working on my own trading setup. I didn’t want to pay enterprise licensing just to render candles, nor did I want to bloat my bundle with massive dependencies.

So, I decided to go down the rabbit hole and build TradeCanvas from scratch.

What I set out to solve:

• Pure Canvas rendering: Direct control over pixel projection, rendering loop, and double-buffering without DOM thrashing.

• 60 FPS smoothness: Viewport culling so panning across thousands of historical ticks doesn't choke the browser.

• Clean separation of layers: Separated the background grid, main candles, crosshair overlay, and indicator pipelines so rendering one doesn't force a full repaint of everything.

• Zero vendor lock-in: A clean, standalone library designed for developers who just want full control of their charting stack.

It's still in active development, but the core engine, multi-timeframe candle rendering, dynamic price/time scaling, and interactions are working.