There is no template variable that could say whether it is the home page, or not.
However, doing this check is a somewhat easy task.
In your custom module/theme decorate \XLite\Controller\Customer\ACustomer class and add the following method:
Code:
public function isHomePage()
{
return 'main' === $this->getTarget();
}
Now you can use this in any storefront template as follows (any of the following will work):
1.
Code:
<div IF="isHomePage()">....your code goes there...</div>
2.
Code:
{if:isHomePage()}
....your code goes there...
{end:}