What a stop is actually for

Most people describe a stop as the point where they admit they were wrong. That is a nice sentence and it is not what a stop does. A stop is the input that makes everything downstream computable.

Without one, size is a feeling

Position size falls out of three numbers: your account, the fraction of it your rules allow, and the distance from entry to stop. Remove the third and there is nothing left to divide by.

That is why this product refuses to guess. A trade logged without a stop does not get a risk of zero — it gets risk unknown, which is a different fact and looks different on the page.

A missing number and a number that happens to be zero are not the same thing. Treating them alike is how a journal starts flattering you.

The arithmetic, once

For a $10,000 account risking 1%, with entry at 100 and stop at 99:

Risk budget	$100
Risk per unit	$1
Position	100 units

Move the stop to 98 and the position halves. Nothing about your conviction changed; the only thing that changed was the distance, and the distance is the whole calculation.

Three things a stop is not

1. A prediction. It does not say price will not go there — it says what you do if it does.
2. A measure of confidence. A wider stop is not a stronger opinion, it is a smaller position.
3. Optional on a good setup. The best-looking trade is exactly where this gets skipped.

Where it goes wrong in practice

• Moving it wider mid-trade. The position was sized for the old distance, so the trade you are now in is not the trade you authorized.
• Sizing first, stop second. Backwards, and it always produces the number you wanted.
• A mental stop. Which is to say null, with extra steps.

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None of this is advice about what to trade. It is arithmetic about how much, and the arithmetic does not care which direction you picked.

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