Perspective › Examples

Market — Blotter

Data grid of timestamp, id, Diff from market open and price, sorted by timestamp, with 3 computed expression columns.

Simulated real-time order flow: a stateful matching engine on a private worker, view-mirrored to the UI.

Data

A simulated order book streaming into a Perspective table in real time: orders are created, filled, cancelled and expired continuously, and every data grid, pivot and chart updates incrementally as they arrive.

Generated continuously in the browser by a JavaScript simulation streaming into a Perspective Table.

Configuration

This example is a saved <perspective-viewer> workspace. Pass this JSON to viewer.restoreWorkspace() to reproduce it over the same table:

{
    "layout": {
        "type": "tab-layout",
        "tabs": [
            "p0"
        ],
        "selected": 0
    },
    "panels": {
        "p0": {
            "table": "",
            "theme": null,
            "columns_config": {
                "Diff from market open": {
                    "fg_mode": "bar",
                    "fg_gradient": 12.9
                },
                "if(\"side\"=='buy'){-1}else{1}": {
                    "fg_mode": "bar",
                    "fg_gradient": 8,
                    "aggregate_depth": 1
                },
                "status": {
                    "bg_mode": "series"
                },
                "side": {
                    "bg_mode": "series"
                }
            },
            "plugin": "Datagrid",
            "plugin_config": {},
            "settings": true,
            "title": "Blotter",
            "group_by": [],
            "split_by": [],
            "sort": [
                [
                    "timestamp",
                    "desc"
                ]
            ],
            "filter": [],
            "expressions": {
                "bucket(\"price\", 1)": "bucket(\"price\", 1)",
                "bucket(\"timestamp\", 'm')": "bucket(\"timestamp\", 'm')",
                "Diff from market open": "\"price\" - 20"
            },
            "columns": [
                "timestamp",
                "id",
                "Diff from market open",
                "price",
                "status",
                "side"
            ],
            "aggregates": {}
        }
    },
    "active": "p0"
}

About Perspective

Perspective is an open-source, WebAssembly-powered data grid, pivot table and charting component for large, real-time and streaming datasets — in the browser, Python, Jupyter, Node.js and Rust.

Documentation