Time is profit! This article provides an in-depth analysis of the technical optimization and cost control of short-term foreign exchange swing trading. Comprehensive dismantling of the adaptability advantages of millisecond order execution and no expiry date restrictions for intraday scalping strategies, popular science on how to use MT4/MT5 composite indicator ecology and financial calendar to train market intuition, perspective on the value of ECN/STP straight-through low spread quotation to reduce transaction friction, and detailed explanation of the underlying security defense line of independent custody and negative balance protection.