THE RULES OF THE BOARD

Make the signal legible.

SurgeIndex helps people discover websites earning attention without turning the organic board into a pay-to-rank contest.

current score versionHeat v1Last reviewed · Aug 2026

Heat Score

Heat Score is a deterministic 0–100 signal for current attention relative to a site’s own history. Five explainable components are normalized before they enter the formula.

35% growth · 25% live acceleration · 20% volume · 10% engagement · 10% confidenceRelative growth is paired with absolute lift and a base-support term, so a jump from 1 visitor to 20 cannot automatically beat a credible move from 50,000 to 90,000.
Growth velocityRelative lift, absolute lift, and baseline support.
Live accelerationCurrent active visitors compared with the site’s typical level.
Traffic scaleLog-normalized accepted volume, not paid impressions.

Baselines and missing data

Each site receives a persisted baseline built from accepted historical aggregates. The engine first looks for the same weekday and hour, then the same hour, then a recent rolling window. Median and median absolute deviation keep one anomalous spike from redefining normal.

  • New sites show building baseline until there is enough history.
  • Missing engagement is shown as unavailable and receives a neutral subscore with lower confidence.
  • Historical records remain when a tracker becomes stale; the live ranking state changes instead.

Eligibility and score states

Score state is separate from the displayed number. A provisional score can be useful for discovery while history and confidence grow, but it is capped and kept distinct from fully eligible organic ranking.

Building baselineAccepted history is not yet sufficient for a calibrated score.
not ranked globally
ProvisionalEnough evidence for a bounded league view, but not the full-confidence board.
bounded
EligibleFresh, sufficiently observed, accepted traffic with confidence for the organic board.
rankable
Stale / fraud reviewHistorical data remains visible, but the site is removed from misleading public rank views.
restricted

Leagues

New, Emerging, and Established leagues compare sites with a more appropriate amount of history and scale. League changes use hysteresis so a site does not bounce between labels because of one update.

League membership never changes the underlying formula and is not a way to buy visibility. It only controls the comparison set shown to users.

Organic rank

Public pages read transactionally published current rankings. The deterministic ordering is displayed score, smoothed score, confidence, accepted visitor volume, calculation time, domain, and site ID. Rank movement comes from persisted snapshots, not a client-side guess.

  • Global, league, category, category-and-league, new, and breakout scopes are separate views.
  • Smoothing and breakout persistence reduce noisy oscillation while allowing large genuine changes to move quickly.
  • Sponsored placements remain separate from the organic ranking record.

Breakouts

A breakout requires multiple signals: meaningful relative lift, meaningful absolute lift, live acceleration where supported, fresh accepted traffic, adequate confidence, and persistence across evaluation windows. Entry and exit thresholds are different, and cooldown prevents repeated alert spam.

Paid boosts never affect organic rank or Heat Score.Breakout explanations describe observed traffic only. SurgeIndex does not claim a social, news, Reddit, TikTok, or creator cause without actual attribution.

Verification and sponsored reach

Traffic proof and ownership proof are separate. Tracker and GA4 labels identify the measurement source; claimed ownership does not turn unverified traffic into verified traffic.

Tracker verifiedFirst-party accepted events and active heartbeats where available.
GA4 verifiedImported aggregates from a connected Google Analytics property.
UnverifiedListed metadata without independently connected traffic.
Boost is not a score input.Sponsored opportunities, rendered/qualified impressions, clicks, spend, paid referrals, refunds, and campaign state are reported in a separate product lane. They never combine with tracker or GA4 metrics, never buy a rank, and never create breakout status.

Versioning and known limits

Every persisted score stores its version, calculation window, baseline reference, components, penalties, confidence, and state. The current release is Heat v1. Historical versions remain auditable when the formula changes.

Production quality still depends on source freshness, provider availability, baseline history, and traffic classification. The system is not bot-proof, does not claim scientific validation, and does not infer causality from a breakout.

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