Alerion comes with the Floating Module feature that allows you to 'bounce' a module between the template sections. You can set a starting position on floatingmodule-top and the end position on floatingmodule-bottom for the module, as well as the stopping offset point in the template manager. The stopping offset will stop the module in the exact offset position you would like.
The floating module positions are not general purpose positions that can be used like other positions. They have to be configured and set up perfectly for them to function, as well as the rest of the site/page has to be organized for their use.
The floating module feature also allows a module position to follow the users viewport. For more information how to configure the Floating Module feature, please visit this guide in the Alerion forum.