> For the complete documentation index, see [llms.txt](https://docs.bigbeluga.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bigbeluga.org/ai-extension-sonar-tm/home/order-book.md).

# Order Book

The Order Book tool inside <mark style="color:$primary;">BigBeluga Sonar</mark> brings centralized exchange market depth data directly onto your chart view, giving traders a clear understanding of where real buy and sell pressure exists.

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## **What it shows**

### Heatmap Depth Chart

The central histogram visualizes the "walls" in the market:

* Bids (Green) & Asks (Red): Represents the cumulative buy and sell orders.
* Heatmap Intensity: The brightness/saturation of the bars indicates liquidity concentration. Brighter areas represent massive order blocks (walls) that price is likely to react to.

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* Depth Toggle: Adjust the granularity of the book (e.g., Depth 5 to 50) to see near-price liquidity or major macro walls.

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Use the dropdown to:

> * Adjust how many levels of bids and asks are shown.
> * Get a broader or more focused view of the market liquidity.
> * Easily analyze order flow at different depths.

Perfect for scalpers, intraday traders, and anyone who wants more control over how they visualize market pressure.

### Advanced Market Header

The top bar provides essential context for the current asset’s global state:

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* Funding Rate: Displays the current aggregated funding rate.
  * Green: Positive funding (Longs pay Shorts).
  * Red: Negative funding (Shorts pay Longs).
* Funding Countdown: A live timer showing exactly when the next funding settlement will occur (HH:MM:SS).
* Open Interest (1H): Shows the percentage change in Open Interest over the last hour. This helps confirm if a price move is backed by new capital entering the market.

### **Volume Table**

A detailed breakdown of individual price levels showing exact bid, ask, and volume figures.

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## **How it helps**

> * Spot large buy/sell walls and hidden liquidity areas that might stop or trigger price movements.
> * Time entries and exits around thin areas in the book where price could move quickly.
> * Detect spoofing behavior or sudden shifts in liquidity.

### **Use case example**

You're watching a coin near resistance, and the order book shows a large cluster of sell orders just above current price. This could suggest limited upside unless that wall is broken, giving you a reason to wait for confirmation before going long.