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    "type": "methodology",
    "slug": "momentum-signal",
    "title": "Momentum Signal Methodology",
    "description": "Directional historical signal for electricity price trend direction.",
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    "jsonUrl": "https://priceofelectricity.com/knowledge/methodology/momentum-signal.json",
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        "sourceName": "PriceOfElectricity.com methodology: Momentum Signal",
        "sourceUrl": "https://priceofelectricity.com/knowledge/methodology/momentum-signal",
        "publisher": "PriceOfElectricity.com",
        "license": "Site content license",
        "retrievedAt": "2026-02-22T00:00:00.000Z"
      }
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      {
        "sourceName": "PriceOfElectricity.com methodology: Momentum Signal",
        "sourceUrl": "https://priceofelectricity.com/knowledge/methodology/momentum-signal",
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      "semanticTopics": [
        "methodology",
        "electricity rates",
        "index calculation",
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      "datasetUpdatedAt": "2026-02-22T00:00:00.000Z",
      "computedAt": "2026-02-22T00:00:00.000Z",
      "status": "fresh",
      "ageDays": 0,
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        "canonicalUrl": "https://priceofelectricity.com/knowledge/methodology/freshness"
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    },
    "excerpt": "Momentum Signal Methodology. Defines how metrics is computed from inputs and produces derived fields used across state and ranking pages.",
    "disclaimerRefs": [
      "methodology"
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    "methodology": {
      "id": "momentum-signal",
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  "data": {
    "definition": "The momentum signal is a directional historical signal that summarizes whether a state's electricity prices appear to be accelerating, rising, stable, or falling. It is not a forecast.",
    "inputs": [
      "Historical monthly avgRateCentsPerKwh",
      "Short window (~12 months ago to most recent)",
      "Long window (~24 months ago to most recent)"
    ],
    "steps": [
      "Use up to 24 most recent monthly points.",
      "Require at least 6 usable points for a signal.",
      "shortWindowChange = percent change from ~12 months ago to most recent.",
      "longWindowChange = percent change from ~24 months ago to most recent.",
      "acceleration = shortWindowChange - (longWindowChange / comparable_years_factor).",
      "Classify: accelerating (shortWindowChange > 3% AND acceleration > 1%), rising (shortWindowChange > 1%), falling (shortWindowChange < -1%), otherwise stable.",
      "momentumScore: accelerating = 2 + shortWindowChange, rising = 1 + shortWindowChange, stable = 0, falling = -1 + shortWindowChange."
    ],
    "limitations": [
      "This is a directional historical signal, not a forecast.",
      "Missing or limited history can make the signal unavailable.",
      "Thresholds are deterministic and transparent."
    ],
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      "rankings": [
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