> For the complete documentation index, see [llms.txt](https://docs.tread.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tread.fi/creating-and-submitting-orders/advanced-settings/passive-only.md).

# Passive Only

**Passive Only** ensures that the engine **does not cross the spread or take liquidity**, meaning all fills will be **maker-type (limit) orders**. This setting helps traders **add liquidity to the market** while reducing execution costs, as **maker fees are typically lower than taker fees**.

#### **How It Works**

* The engine **only places passive limit orders**, preventing orders from executing immediately as taker orders.
* Helps traders **optimize execution costs** by avoiding **higher taker fees**.

#### **Considerations**

* **Fill quantities may occasionally fall below the trajectory's lower bound**, as the engine **cannot guarantee fills without taking liquidity**.
* **Orders may not reach the full target quantity** if the **duration expires** before all fills are completed.

This setting is useful for traders prioritizing **cost efficiency over execution speed**, ensuring all orders contribute to market liquidity.