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

# Classic order flow (WIP)

> Heatmaps and footprints on multi-exchange data.

Classic order flow tools on MarketLens: **heatmaps** and **footprints**, built for multi-exchange selection rather than a single venue tab.

## Heatmap

Order book history over time — resting liquidity as price and time evolve.

*Content and screenshots to come.*

## Footprints

Volume (and related) structure inside each bar or price bucket.

*Content and screenshots to come.*

## Multi-market

How aggregation affects classic OF when several venues are selected.

*Content to come.*

See also: [Unified order flow](/unified-order-flow), [L2 order book](/order-book).