3 fingers Drag (OS X Style)

Require Fusuma v2 or later

swipe:
  3:
    begin:
      command: xdotool mousedown 1
    update:
      command: xdotool mousemove_relative -- $move_x, $move_y
      interval: 0.01
      accel: 2
    end:
      command: xdotool mouseup 1

If you're using wayland, you might try ydotool as well. Here is a short guide on setting this up.