You can log in to your website as one of your leads by clicking the Login As User button on the top right in the CRM. You will be taken to the lead's Saved Searches list in your website. At the top of the page you will see a small banner at the top of the page. Now that you're logged in, you can use the site as if you were the lead.
To create saved searches based on advanced criteria, use the “Create Saved Search” button in the Quick Login banner at the top of the page. This gives you access to all of the fields available from your MLS board.
After you specify the search criteria, click Create Search. The page will update and you will see the new search in the Saved Searchs list.