> ## Documentation Index
> Fetch the complete documentation index at: https://docs.linegap.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Line Movement

> Opening lines, multi-book timeline charts, and per-prop movement history captured every 30 minutes — see exactly how each prop has moved over time.

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.

## What you can do with line movement data

<CardGroup cols={2}>
  <Card title="See where the line opened" icon="circle-arrow-up">
    Every prop tracks its opening line — the earliest captured value, with attribution to the book that posted it first.
  </Card>

  <Card title="Watch the line evolve" icon="chart-line">
    Click any prop to expand its timeline chart. Multi-book overlay shows you which books moved when.
  </Card>

  <Card title="Spot lagging books" icon="hourglass">
    The book comparison view highlights which books are still showing stale lines vs. which have caught up to the current consensus.
  </Card>

  <Card title="Find your opportunity window" icon="bullseye">
    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.
  </Card>
</CardGroup>

## The timeline chart

When you expand a prop on the [dashboard](/features/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

## 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.

## Data freshness signals

<Note>
  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.
</Note>

For the full data freshness model (cron schedule, snapshot types, when to refresh), see [Data Freshness](/features/data-freshness).

## Coming soon

<CardGroup cols={2}>
  <Card title="Book leadership scoring" icon="award">
    <span className="text-xs text-muted-foreground">Coming soon</span>

    Once 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.
  </Card>

  <Card title="Movement narratives" icon="sparkles">
    Already shipped — see [AI Movement Narratives](/features/ai-narratives). One-click 1-2 sentence summaries of how a line has moved, grounded in actual data.
  </Card>
</CardGroup>