> For the complete documentation index, see [llms.txt](https://support.backpack.exchange/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.backpack.exchange/exchange/trading/trading-bots/perpetual-grid.md).

# Perpetual Grid

### Grid Direction (Perpetuals Only)

Each grid can have a directional bias:

* **Neutral (default)**\
  Standard grid behavior — buys below, sells above, no directional bias
* **Long**\
  Buys across all levels at startup → builds long exposure → then runs the grid (buy below, sell above) with long bias
* **Short**\
  Sells across all levels at startup → builds short exposure → then runs the grid (buy below, sell above) with short bias

Changing direction triggers a **partial reset**:

* Exposure and PnL are preserved
* Orders are recalculated

### Trailing Up & Down

Trailing automatically shifts the grid range when price moves beyond it.

**How it works**

If price moves beyond the range by more than one grid step:

* The entire range shifts in that direction
* The same logic applies in both upward and downward directions

**Constraints**

* Upper bound: **Trailing Up**
* Lower bound: **Trailing Down**

**Example**

* Initial range: \[90, 110] with grid step of 2
* Trailing Up: 130
* Price → 120 → New range: \[100, 120]
* Price → 135 → Capped at \[110, 130]

**Validation Rules**

* **Trailing Down** must be at least one grid step below the **Price Lower Limit**
* **Trailing Up** must be at least one grid step above the **Price Upper Limit**
* If price stops are set:
  * **Lower Stop** must be below **Trailing Down**
  * **Upper Stop** must be above **Trailing Up**


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