Technology
The Transformative Role of Technology in Modern Trading
Introduction
In algorithmic trading, speed is not just an advantage—it is a necessity. Every microsecond saved can translate into better fills, reduced slippage, and improved profitability. While REST API-based execution has made algorithmic trading accessible to a broader audience, professional trading desks require something more powerful: server-based execution.
Enter BlitzTrader a server-based automated trading platform engineered to give professional trading desks a fast time-to-market for their backtested and optimized strategies. This article explains the critical differences between REST API execution and BlitzTrader's server-based model, and why latency-sensitive traders choose Blitz.
Latency is the total delay from the moment your strategy generates a signal until the order reaches the exchange’s matching engine. It includes:
• Network travel time
• Processing delays at gateways
• Queueing at API layers
• Internet hops between your server and the broker/exchange
In retail trading, a few hundred milliseconds may be acceptable. For professional desks running high-frequency or latency-sensitive strategies, even 10–20 milliseconds can erode edge. This is where infrastructure becomes as important as software.
BlitzTrader is a broker-neutral trading platform designed for electronic trading across multiple asset classes—commodities, equities, options, fixed income, and derivatives. Its open architecture allows users to create and deploy proprietary, complex trading strategies with ease.
Key capabilities include:
• Real-time risk controls and performance monitoring
• Automated trade workflows for front, middle, and back-office operations
• Pricing, trade capture, position management, and reporting
• Direct order routing to any global market destination (via broker or direct exchange connectivity)
• Scalability across global markets
BlitzTrader addresses the need for streamlined, flexible trade execution in environments demanding automation, scalability, and regulatory compliance.
What is a REST API?
REST API is a standardized way for applications to communicate over HTTP. It allows traders to automate processes and execute trades. REST APIs are simple, broker-friendly, and stateless. However, they come with higher latency overhead because each request requires a new HTTP connection and handshake. They are best suited where microsecond-level speed is not critical.
What is WebSocket?
WebSocket enables full-duplex, real-time communication over a single TCP connection. It keeps the connection open, allowing continuous data streaming—ideal for live market data, order book updates, and real-time trade notifications.
BlitzTrader provides high-speed WebSocket-based market data streaming directly from its collocated exchange gateways, delivering Tick-by-Tick (TBT) data with full order book depth. This ensures traders and strategies receive high-quality, ultra-low latency market updates in real time.
The Latency Problem with API-Based Execution
Most OMS platforms provide an API gateway to accept orders from external systems. While API-based execution is cheaper and accessible, it introduces multiple latency sources:
| Factor | Impact |
|---|---|
| Internet round-trip | High variability |
| API gateway processing | Added overhead |
| HTTP handshake | Slower than persistent connections |
| Geographic distance | Significant delay |
REST APIs work well for general retail applications but fall short for professional, latency-sensitive strategies. Institutional traders use FIX protocol or binary APIs—compact message formats requiring specialized infrastructure—for ultra-low latency.
In short: API-based execution adds distance, layers, and protocol overhead between your strategy and the market.
BlitzTrader takes a fundamentally different approach. Instead of sending orders from your remote server over the public internet, BlitzTrader hosts your trading strategies directly on servers located within the broker's infrastructure—ideally at the exchange colocation facility, in close proximity to the matching engine.
How It Works:
1. Your strategy logic is deployed on BlitzTrader's server near the exchange.
2. Market data is streamed directly from the exchange via high-speed feeds.
3. Execution signals are generated and routed instantly to the matching engine.
4. No internet round-trip, no API gateway bottleneck.
Key Advantages:
| Feature | Benefit |
|---|---|
| Proximity to matching engine | Drastically reduced physical distance |
| No internet dependency | Eliminates network variability |
| Direct exchange connectivity | Removes broker API gateway delays |
| Server-based hosting | Reduces risk of multiple point failures |
Result: Significantly lower and more consistent execution latency compared to any REST API-based model.
The Best of Both Worlds: Blitz's Hybrid Approach
BlitzTrader recognizes that not every firm wants to deploy proprietary alpha directly on a third-party server. For traders who prefer to keep their execution logic and IP under their own control, BlitzTrader offers a REST API that remains highly performant.
Even in this model, you still benefit from:
• Blitz's WebSocket-based market data (collocated TBT feeds)
• Reliable order routing via Blitz's optimized connectivity
Fusion Model: Intelligent Signal + Server Execution
BlitzTrader also supports a fusion architecture where:
• The execution engine resides on Blitz's low-latency server (near the exchange)
• Your intelligent strategy logic runs on your own cloud or on-premise server
• You send trading signals to Blitz via REST API
• Blitz handles ultra-fast execution at the exchange
This gives you the best of both worlds: alpha protection on your side + institutional-grade execution speed on Blitz's side.
Why Latency Matters: API vs. Server Execution
| Parameter | REST API Execution | Blitz Server Execution |
|---|---|---|
| Round-trip time | 50–200+ ms (variable) | < 1 ms (consistent) |
| Internet dependency | High | None |
| Proximity to exchange | Far (client location) | Colocated / near matching engine |
| Risk of failure | Multiple points | Minimal |
| Suitable for | Retail, non-latency-sensitive strategies | Professional, HFT, market-making, arbitrage |
Latency is not just about software—infrastructure plays a critical role. BlitzTrader takes a holistic approach, combining optimized code with strategic infrastructure placement.
For professional trading desks moving from backtest to live execution with speed and reliability, BlitzTrader's server-based execution model offers a clear edge over traditional REST API execution.
• Choose REST API if you are a retail trader or your strategy is not latency-sensitive.
• Choose Blitz Server Execution if you need institutional-grade speed, direct market access, and minimal latency.
• Choose the Fusion Model if you want to protect your proprietary alpha while still benefiting from Blitz's execution speed and high-quality WebSocket market data.
BlitzTrader empowers you to automate, scale, and compete so you can focus on what matters most: winning in the markets.
