Auto-generated. This article is rebuilt from app/signals/config/signal_definitions.json by scripts/build_signals_kb.py. Edit the registry entry and re-run the script — do not edit this file directly.

Crack spread band

What it is

Crack spread band — registry key crack_signal.

Qualitative band label for the 3-2-1 crack spread (Normal / Wide / Very wide / Narrow / Collapsed); companion text to the numeric crack_spread.

Source

Source module: energy
Data source: back_fillable

Fetched directly from app/sources/energy.py; see source code for the upstream API call and any provider-specific handling.

How it’s computed

band_for('crack_spread', crack_spread).label — reuses the canonical crack_spread bands declared on the same registry entry. See app/sources/energy.py:105.

Where it surfaces

• API field: energy.crack_signal on GET /api/v1/signals/latest
• Surface: daily_signals row (daily-cadence persistence)
• Surface: change markers in the rendered report

Health-score / alignment role

Data carrier — no implication, no health-score contribution.

Persisted for downstream consumers (sparklines, base-rate matcher, calibration substrate) but does not classify into BULLISH / NEUTRAL / BEARISH and does not contribute to the 0-100 health score.

Release cadence

• Publishes: intraday

See also

• /kb/api/get-signals-latest — API endpoint that serves this field.