In-depth analysis of the core risk control and cost optimization mechanisms of retail foreign exchange transactions! This article focuses on the transparent low-spread pricing system of major currency pairs and details its compound interest gains for intraday high-frequency strategies. In-depth dismantling of the dual fund security architecture of "authoritative license supervision + top bank independent account custody", and a perspective on how mainstream automated trading systems (EA) combined with VPS virtual private servers can achieve an efficiency revolution in foreign exchange quantitative backtesting and negative balance protection.