The clips can be moved both up and down the chart so there is always room for improvment in the child's behavior. And a child can have more than just "good behavior". The website this chart is featured on even has free acess to teacher reports you can send home with the students.
http://sunnydaysinsecondgrade.blogspot.com/2011/07/clip-it-up.html
This chart also seems to be the one that pops up the most when looking at different behavior charts.