Page with selected filter

Hi,

Thanks for your amazing plugin !

I have a question :
I have a page with a shortcode to show only “on sale” products.
On the left column I have the woof code but the problem is filtering all the product on my website not only those ones you can see in this page.

So my question is :
Is it possible too make the woof code with filter onsale already selected ?

Thank you

Mat

The page I need help with: [log in to see the link]