Crypto Trading Dashboard

The Challenge

Traders needed a single, fast view of live prices, holdings, and performance across exchanges.

Our Solution

We built a streaming dashboard with live charts, multi-exchange portfolio aggregation, and configurable price alerts.

How we approach this kind of build

Latency budget drives every decision. Market data arrives over persistent connections rather than polling, updates are batched to the display refresh rate instead of rendering per tick, and charts draw to canvas rather than the DOM — a few hundred DOM nodes updating many times a second will drop frames on any machine, regardless of how the data arrives.

Portfolio aggregation across exchanges is mostly a normalisation problem. Every venue reports balances, fills, and fees differently, symbols do not agree, and rate limits vary, so we normalise into a single internal model and reconcile continuously. Cost basis and realised performance are computed from the trade ledger rather than trusted from any single exchange's reporting.

API credentials are treated as the highest-value asset in the system: encrypted at rest, scoped to read-only wherever the feature allows, and never exposed to the browser. Alerts evaluate server-side so they fire whether or not the user has the dashboard open, which is the entire point of having them.