Edge is a long-run phenomenon
A genuine edge of a few percent is invisible over ten decisions and obvious over a thousand. In the short run, results are dominated by variance; in the long run, they converge on the underlying math. This is why a short time horizon is so dangerous — it forces you to draw conclusions from a sample far too small to mean anything, and to act on noise as if it were signal.
Why the wrong horizon ruins good decisions
If you judge a sound strategy over a single weekend, you will sometimes see a loss and quit a winning approach, and sometimes see a fluke win and double down on a losing one. Both errors come from the same root: measuring over a window too short for the truth to appear. A longer horizon does not change your edge, but it changes whether you can actually see it.
Patience as a competitive advantage
Most people cannot tolerate a long horizon. They want confirmation now, so they overtrade, switch strategies and abandon plans at the first cold streak. Simply being willing to wait — to let a sound process run long enough to express its edge — puts you ahead of a large share of the market, not because you are smarter, but because you are harder to shake.
Set the horizon, then protect it
Decide up front over how many decisions or how many months you will evaluate a strategy, and commit to not re-judging it before then. Track the process metrics you can control in the meantime, and let the results accumulate. Give your edge the one thing it actually needs to show up: time.