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Line movement is the core differentiator of Line Gap. Every 30 minutes, we capture a fresh snapshot of every player prop across every supported book, then store it. Over time, this builds a complete history of how each line has moved.

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What you can do with line movement data

See where the line opened

Every prop tracks its opening line — the earliest captured value, with attribution to the book that posted it first.

Watch the line evolve

Click any prop to expand its timeline chart. Multi-book overlay shows you which books moved when.

Spot lagging books

The book comparison view highlights which books are still showing stale lines vs. which have caught up to the current consensus.

Find your opportunity window

If a line has moved against the public side, the original number may still be live at one or two slower books — that’s where edge lives.

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The timeline chart

When you expand a prop on the dashboard, you get an interactive line movement chart with:
  • Multi-book overlay — each book gets its own line; toggle visibility per book
  • Window switching — last 6 hours, 24 hours, or full history
  • Magnitude indicators — arrows and color cues show direction and size of recent moves
  • Opening line marker — explicitly attributed to the book that posted first

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Tiered UX

The dashboard supports two modes, persisted per prop type:
  • Simple — single best-line card with the strongest current price
  • Advanced — full book-by-book comparison with EV ranking and movement deltas
You can toggle modes per prop type, so player points (where you might want full sharps view) can be Advanced while player threes (where you trust the dashboard) stays Simple.

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Data freshness signals

The dashboard shows a last-updated badge at the page header — relative time since the most recent snapshot, with a stale warning if it crosses your visibility threshold.
For the full data freshness model (cron schedule, snapshot types, when to refresh), see Data Freshness.

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Coming soon

Book leadership scoring

Coming soonOnce we accumulate ~2 weeks of dense polling data, we’ll surface per-book “leader” / “follower” badges based on which books historically move first vs. catch up.

Movement narratives

Already shipped — see AI Movement Narratives. One-click 1-2 sentence summaries of how a line has moved, grounded in actual data.