D08-F07-A16 · LEVEL 2 GUIDED LAB · SYNTHETIC DATA

Higher-High/Lower-Low Structure

What ordered structure do causally confirmed swings form? 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

compare consecutive confirmed swing highs and lows with tick tolerance; emit HH, HL, LH, or LL transitions

Availability rule

A state at t may use only observations available through t; confirmed swings retain their confirmation timestamp and are never relabeled as known at the pivot bar.

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 (D08-F07-A16)
{
  "swing_high": null,
  "swing_low": null,
  "structure": "none"
}

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