Why I Don't Trust a Strategy Just Because It Worked Yesterday

A setup works beautifully on Monday, so I expect the same result on Tuesday.

Then market conditions change.

Volatility shifts, price structure changes, and the same pattern produces a different outcome.

One successful session isn't enough to establish reliability.

I want to test the setup across multiple examples and different conditions while accounting for trading costs.

Confidence should come from a body of evidence, not from the memory of one profitable day.