Formula
The formula is displayed so the result can be checked independently. PreBreakout does not use a hidden scoring model on this page.
Worked hypothetical example
A hypothetical range from 95 to 100 is 5 units wide, equal to about 5.26% of the low value.
Important: the numbers are fictional and are not associated with a security, issuer or current market price.
What this calculator does not tell you
- The high must be greater than the low.
- The formula uses the low as the reference denominator.
- Range width alone says nothing about what happens next.
Market execution can differ from arithmetic inputs because of spreads, gaps, slippage, order types, broker constraints and other factors. This tool does not attempt to model those effects unless an input explicitly asks for a value.
How to use it for learning
Change one input at a time and observe how the result changes. This is especially useful for understanding sensitivity: wider stop distance changes position-size arithmetic, a taller pattern changes a measured-move result, and a larger reward-to-risk ratio changes the theoretical break-even win rate. The exercise is about the formula, not about identifying a trade.