A profitable backtest can still fail a prop firm test in a single afternoon. The reason is simple: prop firm tests are not ordinary trading accounts. Generating positive expectancy is only part of the assignment.The goal is not maximum return at any cost. It is to earn enough profit while remaining

Many traders discover an uncomfortable truth: an algorithm that makes money is not automatically an algorithm that can pass a prop firm evaluation. The reason is simple: prop firm tests are not ordinary trading accounts. The algorithm must balance profitability with strict operational discipline.Pas