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

# Stop Market

> Trigger a market order at your stop price for guaranteed execution when a level breaks.

A Stop Market order waits until the asset price reaches your stop price, then executes immediately at market. The objective is certainty of execution: when your level breaks you are filled, at the cost of accepting whatever prices the book offers at that moment.

## How it places orders

* No trade executes at submission. The order waits until the asset price reaches your stop price.
* With **Stealth** on (the default), Hyperdash infrastructure watches price and sends the order only once triggered, keeping it hidden until then. With Stealth off, the stop is placed publicly on-chain as a trigger order.
* At trigger, a market order for the full size executes immediately, taking liquidity at the best available prices until filled.
* The fill price is not guaranteed. In fast or thin markets the average fill can be worse than your stop price, since the order walks the book once triggered.

## When to use it

* Protect a position with a hard exit: when your level breaks you want out, not a resting order. Enable **Reduce Only** so it can only close the position.
* Enter momentum trades where missing the move costs more than a few ticks of slippage.
* Trade around events or thin books where price can gap through a limit price entirely.

## Parameters

| Parameter              | Description and options                                                     | Default |
| ---------------------- | --------------------------------------------------------------------------- | ------- |
| Stop Price (USD)       | Trigger price: above the current price for buys, below for sells.           | None    |
| Size                   | In the asset or USD. Minimum order value \$10.                              | None    |
| Reduce Only (optional) | Order can only reduce an existing position.                                 | Off     |
| Stealth (optional)     | Routes the stop through Hyperdash infrastructure, off-book until triggered. | On      |

## Example

You are long 400 HYPE from \$41.00 and want a hard stop under support at \$42.50. You place a sell Stop Market: stop \$42.00, size 400 HYPE, Reduce Only on. If HYPE trades down to \$42.00, the position is closed at market immediately, for example at an average of \$41.96 in a normal book.

<Note>
  A stop market guarantees the exit, not the price. If capping your worst fill matters more, use a [Stop Limit](/orders/stop-limit) and accept the risk of resting unfilled.
</Note>