`StreamChart`¶

class StreamChart(width: int, height: int, toolbox: bool)¶

StreamChart serves a fully-featured chart over HTTP/WebSocket so it can be viewed in any browser without opening a desktop window. It is a drop-in replacement for Chart for headless, remote-development, or notebook environments.

The class inherits every method from AbstractChart (candlestick data, line/area/histogram series, plugins, pane management, etc.).

from lightweight_charts import StreamChart

chart = StreamChart()
chart.set(df)       # same API as Chart
chart.show(port=8080, block=True)

Running the script prints a URL like:

Chart server running at http://127.0.0.1:8080/?token=<64-hex-chars>

Open the URL in any browser. The token is a one-time secret — keep it private.

Tip: the printed URL is a one-time CSRF-like token; do not expose it publicly. To open the browser automatically, pass open_browser=True to show().

show(port: int, host: str, open_browser: bool, block: bool)¶

Starts the FastAPI/Uvicorn server and optionally opens the system browser.

port (int, default 8080): TCP port to listen on.
host (str, default “127.0.0.1”): Bind address. Use "0.0.0.0" for LAN access (a security reminder is printed).
open_browser (bool, default False): Open the default browser to the chart URL.
block (bool, default True): Block the calling thread until Ctrl+C is received.

StreamChart¶

`StreamChart`¶