October 4, 2026

Speed earns attention in electronic trading, but controlled decision quality is what keeps the system alive. Arbitrage is exposed between the legs.

A compact operating checklist is: 1) measure completion-time distributions; 2) stress the cost of neutralising the unmatched leg; 3) track filled and remaining quantity after every event.

Which measurement would most quickly reveal that this control is failing in your live order path?

#Arbitrage #HFT

The research behind this lesson

This paper explains The seminar frames electronic markets as price-time-priority queues. It separates queue value into spread capture versus adverse-selection cost and the option value of retaining a place in line.

Applied to this XCore lesson: An order lifetime therefore cannot be based on elapsed time alone: the system must reassess whether its queue position, expected spread and adverse-selection risk still justify keeping the order alive.

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Source: High-Frequency Trading and Modern Market Microstructure

Educational content only. Trading leveraged products involves risk.