Build or extend a terminal. This is the largest thing you can build with this library, so build it in the order below and get each layer working before starting the next.

Two working references exist. Read the one closer to the user's stack before writing code:

examples/yfinance/index.html in the openalgo-charts repo - a native-ESM terminal shell with modules under src/, no framework.
frontend/src/components/trading/ChartPane.tsx and frontend/src/lib/trading/terminal.ts in the OpenAlgo application repo - a production React terminal. Its central lesson: keep chart orchestration in a plain TypeScript module and let React own only the DOM shell.

For async startup, pagination, replay entry/exit and concurrent registration, read host-integration. The widget already implements its documented reconnect recovery; a custom terminal must protect every data writer, including polling and older-history responses.

openalgo-chart-terminal