fcharts Playground

— points × — series render: — ← Landing

Live data (Binance)

Symbol

Streams real trades straight into the chart via chart.append() — your browser connects to Binance.

Title & axes

Chart title (accessible name)

X axis label

Y axis label

Data

Shape

Points per series: 20,000

Frame cost stays flat as you crank this up — the min/max pyramid renders per pixel, not per point.

Series

Options

Show legend Integer x ticks

X ticks

Y ticks

Reduced motion High contrast

UI language (the strings option)

Switch to Français and Tab into the chart — the keyboard help, legend, and screen-reader summary are all localized.

Tab into the chart, then ← → move · ↑ ↓ switch series · + − zoom · Esc dismiss · or scroll to zoom, drag to pan. Every move is announced to screen readers.

Config — copy & paste

summary() — what an AI agent reads