Break the boundaries of multiple assets and unlock the freedom of global market rotation strategies! This article provides an in-depth analysis of how to cross the boundaries of time and space through one-stop Contracts for Difference (CFD) to seamlessly build an all-weather diversified investment portfolio covering foreign exchange, star stocks, safe-haven commodities and cryptocurrencies. Detailed dismantling of the mathematical logic of leveraging the capital turnover rate under the margin system, and exploring how to find the optimal solution on the balance of risk and return through strict real-time margin monitoring and negative balance protection.