# Depth Profile (order book aggregation)

## Help: Depth Profile (order book aggregation)

The **Depth Profile** widget (order book aggregation panel) shows **liquidity across many exchanges** in one place. You can view **one merged book**, **each exchange separately**, or **merge only the venues you select**.

Use it to see **where size stacks**, compare **per-exchange** books, and—when enabled—support **order-book indicators** on the main chart.

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### Topics

| Topic                     | What you’ll learn                                                              |
| ------------------------- | ------------------------------------------------------------------------------ |
| Using the Depth Profile   | Open the widget, header controls, view modes, tick size, resize, hover & click |
| Tips & reading the market | AGG vs per-exchange, reading liquidity shape, chart confluence                 |

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### Related help

| Topic                                                 | Link                     |
| ----------------------------------------------------- | ------------------------ |
| Other side panels (DOM, classic order book)           | Chart Terminal — widgets |
| DOM Ladder (vertical ladder UI)                       | DOM help                 |
| Order-book indicators (OB Signals, OB Flow, OB Micro) | Indicators reference     |
| Heatmap **behind candles** (different feature)        | Orderbook heatmap        |


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