<h2 style="margin:26px 0 12px 0; line-height:1.3;">There is no universal minimum</h2><p style="text-align:justify; margin:0 0 16px 0; line-height:1.65;">Asking for a fixed number of trades is understandable, but sample sufficiency depends on the decision, trade distribution and diversity of conditions. Twenty trades are rarely enough for a strong conclusion. Ten thousand highly dependent trades can also create false confidence.</p><h2 style="margin:26px 0 12px 0; line-height:1.3;">Start with uncertainty</h2><p style="text-align:justify; margin:0 0 16px 0; line-height:1.65;">Win rate, average return and drawdown are estimates. With a small sample, their confidence ranges are wide. One large winner or an absent tail loss can dominate the report. Evaluate how much the conclusion changes when a few trades are removed or costs increase.</p><h2 style="margin:26px 0 12px 0; line-height:1.3;">Measure concentration</h2><p style="text-align:justify; margin:0 0 16px 0; line-height:1.65;">Break results down by month, symbol, session, direction and regime. A large count concentrated in one environment does not support claims about many environments. Evidence becomes stronger when it covers the conditions in which the strategy is expected to operate.</p><h2 style="margin:26px 0 12px 0; line-height:1.3;">Match sample size to frequency</h2><p style="text-align:justify; margin:0 0 16px 0; line-height:1.65;">A low-frequency swing system may require years to collect enough events. A high-frequency system accumulates trades faster but is often more sensitive to execution and dependence. Time coverage and trade count should be evaluated together.</p><h2 style="margin:26px 0 12px 0; line-height:1.3;">Use incremental stability</h2><p style="text-align:justify; margin:0 0 16px 0; line-height:1.65;">Recalculate key metrics as the sample grows. If expectancy, drawdown and trade behavior change radically whenever a new segment is added, the estimate is not yet stable. Gradual convergence is more informative than one final number.</p><h2 style="margin:26px 0 12px 0; line-height:1.3;">Make the claim proportional to the evidence</h2><p style="text-align:justify; margin:0 0 16px 0; line-height:1.65;">A small sample can justify continued research, but not a strong performance promise. The correct question is not “Is this enough data?” in isolation. It is “Is this enough diverse, independent evidence for the decision I am about to make?”</p><p style="text-align:justify; margin:0 0 16px 0; line-height:1.65;"><em>Statistical evidence and historical results do not guarantee future trading performance.</em></p>
