# Market order: short/long

We will illustrate how to open a position at market price with a long position. The process is the same for shorts; you just need to click on “Short” on the home screen. When clicking on long, this is the form that you'll see: 

{% embed url="<https://mass-assets.lon1.cdn.digitaloceanspaces.com/Documentation/market-long.mp4>" %}

There are two mandatory field there to open a position:&#x20;

1. Your margin in USDC
2. Your leverage&#x20;

{% hint style="info" %}
The minimum position size must be $10.
{% endhint %}

***

#### Take profit / Stop loss

An optional field appears at the bottom of the form. By clicking “Add,” you can include take-profit and stop-loss orders to your position.&#x20;

A take-profit or stop-loss order will automatically close your position when the underlying asset reaches a specific price.

{% hint style="info" %}
When opening a long position, your SL order cannot be set at a price lower than your estimated liquidation price. Similarly, when opening a short position, it cannot be set at a price higher than your estimated liquidation price.
{% endhint %}

{% embed url="<https://mass-assets.lon1.cdn.digitaloceanspaces.com/Documentation/add-tp-sl-hl.mp4>" %}

{% hint style="info" %}
You can always edit your TP/SL after the position is open. You can learn more about it [there](https://docs.mass.money/general/perps/market-orders/edit-tp-sl).&#x20;
{% endhint %}