Damn it, I finally understand why all my quantitative tests are losing money. It's because their backtest data is inaccurate. How can the data from gaming graphics cards be reliable? The data is slow and imprecise, and the errors accumulate. Going from profit to loss can be just a small decimal point. Truly profitable quant strategies rely on AI supercomputers, which use chips costing hundreds of thousands each. Renting one costs tens of thousands per month, and the entire machine costs millions. Ordinary quant traders can't afford to buy such equipment.