Reject a single rigid indicator and use full-scenario strategy switching to open up the long-short profit closed loop! This article provides an in-depth introduction to the three mainstream practical strategies of Contracts for Difference (CFD): the trend following model based on the determination of the golden cross of the 5/20/60 daily moving average, the risk control red line for breaking support and resistance levels in sideways fluctuations, and the data-driven play during the non-agricultural and CPI interest rate decision windows. It details how to use the customized position ratio and independent stop loss of the intelligent copying system to avoid emotional internal friction.