D07-F02-A12 · LEVEL 2 GUIDED LAB · SYNTHETIC DATA

Trend Intensity Index

What share of recent deviation from a baseline lies above that baseline? 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

TII=100*sum positive(C-SMA_n(C),m)/(sum positive deviations + sum absolute negative deviations)

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-F02-A12)
{
  "value": 57.21213322600646
}

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