RChart — WebGPU Trading Terminal

RChart is a single-file, browser-native trading terminal. Live crypto streaming via Binance WebSocket, Python indicators running in your browser via Pyodide, WebGPU-rendered charts, drawing tools, alerts, and an optional AI Copilot.

Features

Live crypto charts streamed from Binance WebSocket
Custom Python indicators executed in the browser via Pyodide
WebGPU-accelerated rendering (60 fps even on integrated GPUs)
Drawing tools: trend lines, horizontal lines, freehand with pen pressure, rectangles, Fibonacci retracements
Pine Script paste with best-effort auto-translation
Alerts with browser notifications + Web Audio
RUFT Cohesion indicator: spectrum share on Fibonacci vs power-of-2 cycles
Optional AI Copilot — bring your own Claude API key, run a local agent server, or use Ollama

Why RChart

Pine Script can't run FFTs, wavelets, or numpy. RChart can. It's a free, no-install, no-account, brutalist alternative to heavyweight charting platforms.

Requires a browser with WebGPU enabled (Chrome, Edge, or Safari). Enable JavaScript to load the chart.

RCHART

BTC/USDT· 5m▾

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24h VOL—

24h RNG—

init

⊞

↻

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κ —

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enter applies · quote defaults to USDT

CLAUDE not loaded

CLAUDE

Claude — frontier model on Anthropic. Auto-uses the Agent SDK (full filesystem / bash / web / subagents / Python) if its local server is running, else falls back to direct-browser API (limited tools). ~cents per day either way. Checking…

ANTHROPIC API KEY

Get one at console.anthropic.com/settings/keys. Stored locally in your browser only.

MODEL

▲ RCHART

DESKTOP RECOMMENDED

RChart is built for a wide screen, mouse, and keyboard. The header, drawing tools, and indicators won't scale well to a phone — and WebGPU on mobile is hit-or-miss.

Best experience: open this URL on a desktop or laptop with Chrome, Edge, or Safari.

▲ RCHART

WebGPU TRADING TERMINAL — SINGLE FILE, NO INSTALL

WHAT IT IS

Live crypto chart streaming from Binance. Runs custom Python indicators in your browser via Pyodide. Drawing tools, alerts, optional AI Copilot. Doesn't place orders — use your exchange for that.

BASIC CONTROLS

scroll zoom · drag pan · F fit recent · ? full help anytime

HEADS UP

Browser: needs WebGPU (Chrome / Edge / Safari, 2024+ versions). Firefox is iffy.
Region: Binance's public endpoints are blocked in parts of the US. If charts don't load, connect a VPN to a US/EU exit or configure a custom API base.
Copilot is opt-in: bring your own Claude API key in the CLAUDE panel (top-right). Without a key, the chart still works fully — Copilot stays dormant.

rchart.pages.dev

Alert on cross

Delete drawing

press ? for help · scroll to zoom · drag to pan · F fit recent

press ESC or click anywhere to close

▲ RCHART · HELP

Live WebGPU crypto chart streaming Binance data. Runs Python indicators in-browser via Pyodide. Does not place orders — use your exchange terminal for that.

MOUSE

scroll wheel	zoom in / out (anchored to cursor)
click + drag	pan the time axis
hover	crosshair + OHLCV readout at top

KEYBOARD

`F`	fit last 100 candles
`A`	fit all loaded candles
`V`	toggle volume pane
`R`	toggle RSI pane
`B`	toggle RUFT ribbon on price
`T`	toggle trap radar (sweeps, FVGs, liquidity)
`[` `]` `←` `→`	pan left / right
`+` `-`	zoom in / out
`?`	show this help
`ESC`	close help

CONTROLS

1M / 5M / 15M / 1H / 4H / 1D	timeframe · reseeds + reconnects
● VOL	show / hide the volume pane
○ RSI	show / hide the RSI(14) pane
▶ PY	start / stop the Python indicator engine (click again to pause)
SCRIPTS ▾	enable / disable indicators · create / edit custom Python scripts
▷▷ FIT	snap viewport to recent 100 candles

BUILT-IN INDICATORS

SMA(20)	simple moving average — yellow
EMA(50)	exponential moving average — cyan
RSI(14)	relative strength — violet, own pane
FFT cycle + φ-LOCK	dominant cycle (256-bar, Hann, detrended); chip glows orange when period ≈ Fib (8/13/21/34/55/89/144/233 ±7%)
RUFT ribbon	On-price band painted by RUFT cohesion. Green = structural (allowed Fib 3/5/13, tradeable) · Red = trap (large Fib 21/34/55/89, fade extremes) · Blue = mechanical (powers of 2, algo grind). Wider + glowier when net κ clears 0.315 threshold. Thin or muted = don't engage.
Trap radar (HUNT)	Live detection of algo tricks: red ▽ above a bar = stop hunt above (bull trap) · green △ below = stop hunt below (bear trap). Trade reversal in the sweep direction. Faint dashed red/green horizontals = unswept liquidity pools (stops cluster here). Faint colored boxes = fair value gaps (unfilled imbalance, often revisited). SFX plays a 2-note tone the moment a sweep appears.

DRAWING TOOLS

↖ select	cursor · pan + zoom · right-click a drawing to delete it
╱ trend	trendline — click start, click end
─ hline	horizontal level — single click
✎ freehand	pen-pressure freehand (Surface Pen, finger, or mouse)
▭ rect	rectangle / zone — click opposite corners
φ fib	Fibonacci retracement — click swing low, click swing high
swatch	click to cycle drawing color
✕ clear	remove all drawings for the current symbol

Drawings anchor to time + price, so they follow the chart through pan / zoom / timeframe changes and are saved per symbol.

CUSTOM SCRIPTS

contract	define `def compute(closes):` returning a list of the same length
output	drawn as a line on the price pane in the color you pick
helpers	sma, ema, rsi, numpy as np, math are all in scope
storage	scripts + enabled state persist in browser localStorage

HEADER / FOOTER READOUTS

green/red dot	connection status (live / dead / init)
24h VOL / RNG	rolling 24-hour stats
CYCLE	current FFT dominant-cycle period
SRC	data source (BINANCE)
fps	render rate (should peg to monitor refresh)

—

NEW CUSTOM SCRIPT

CLAUDE

▲ RCHART

▲ RCHART

WHAT IT IS

BASIC CONTROLS

HEADS UP

▲ RCHART · HELP

MOUSE

KEYBOARD

CONTROLS

BUILT-IN INDICATORS

DRAWING TOOLS

CUSTOM SCRIPTS

HEADER / FOOTER READOUTS