D07-F06-A10 · LEVEL 2 GUIDED LAB · SYNTHETIC DATA

High-Low Range Percentage

How large is the bar's range relative to its own midpoint? Walk the evidence clock one stage at a time. This lab teaches the publication contract; it does not simulate returns, platform parity, or trade performance.

Selected expression

HL%=100*(H-L)/reference_price; package default reference=(H+L)/2

Availability rule

An output at t may use only finite, basis-consistent observations available through t; chart alignment never moves the information clock backward.

calculated · step 1 of 7

Verified synthetic fixture

This lab is paired with datasets/implementation-fixtures.json: 96 deterministic, oldest-to-newest observations spanning oscillating, rising, and moderating regimes. It is teaching data—not market history or predictive evidence.

Canonical latest output (D07-F06-A10)
{
  "value": 3.1131062534873144
}

Executable checks cover this result, flat/zero-volume boundaries, invalid timestamps, and prefix causality in both language entry points.