Define "roaming". Ball pythons are nocturnal, so they will instinctively be more active at night. Mine come out of their hides at night and hang out in the open, one climbs up the glass and just "explores", by explore I mean tries to find an escape route lol. Racing back and forth can be a sign of stress, but if he's just out looking around, that's normal. You will learn what "hunting mode" looks like, it generally doesn't involve a whole lot of moving for my balls. They tense up and get very "S"ey, heads raised a little off the ground, and constant tongue flicking.