is it possible to start something similar to "autoscroll" with a gesture, as an action? autoscroll = the thing that happends when you press the scroll wheel on a whell mouse.
strokeit doesn't support sending mouse clicks.
However if u really want to do this it's possiible -with some effort.
use autohotkey to make a keyboard shortcut to send middleclick , i am not sure if it will works but the program does allow sending mouseclciks.
next make a gesture to send that hotkey.