High-Frequency Trading Dashboard
Real-time Visualization at Millisecond Speed
Proprietary Trading Firm (confidential)
8 weeks
Senior Frontend Dev, Data Engineer
Situation
Traders were frustrated with a legacy dashboard that lagged during market volatility. When milliseconds equal millions, they needed a UI that could render 50,000+ data points per second without freezing.
Objectives
- Eliminate UI lag during high-volume trading sessions
- Visualize complex order book data in real-time
- Ensure zero-latency interaction for trade execution
What We Did
Moved charting from standard DOM-based libraries to a custom WebGL implementation to handle massive data throughput.
Implemented binary message formats (Protobuf) over WebSockets to reduce huge payload sizes by 70%.
We bypassed standard React state for high-frequency updates, writing directly to the canvas to avoid re-render overhead.
Challenges & Solutions
Memory Leaks
Solution: Aggressive object pooling and manual garbage collection strategies.
Data Noise
Solution: Implemented smart throttling that only draws visible frames without losing data precision.
- Dashboard renders fluidly at 60fps even during market open
- Data latency reduced from 200ms to <15ms
- Traders reported a measurable improvement in execution timing
Deliverables
- Real-time Trading Terminal UI
- Custom Charting Library
- Binary WebSocket Gateway