Autowalking in tibia refers to clicking on a point on your automap or game window and leaving your character to walk there without using the arrow keys. However, there is a range to the distance you can walk with one click, if it is too far you will see a white message at the bottom of the screen saying "Destination out of range". Usually, any point on the automap is in range, unless you have moved the map by the compass to the right of the minimap or the way is partially heading to different directions than destination, in this case, even though the point was within range in the moment you clicked on the map, your character will stop moving by the moment destination is out of range.