At How to Display section you are suggested to adjust the ARP block look and feel:
Note: The sorting orders for WBTAB and WVTAV display modes are defined by default, by Order Counts and View Counts accordingly. In the case of the enabled Override Option in the "Related Products, Up-Sells, and Cross-Sells " tab of the backend product edit editing form the related product blocks using the WBTAB and WVTAV display modes and containing native related products will be sorted by the product positions specified in the corresponding edit editing form.
Once done with all How to Display settings click button. That's it, Automatic Related Products rule has been created.