A rollback is judged by seeing a horse run down, stop hard, turn a 180 degree circle and go back over the previous tracks. Understand how a rollback is judged with helpful advice in this video on riding and caring for horses.
Judging a rollback, what they are looking for is a horse that runs down and stops really hard. And when they do the rollback, all that is, is a one eighty, and a lead departure. So you are going to run down stop, drop your hand, count to two, pick them back up, and rollback over the tracks that you just laid, and lope off in a calm, collected manner.
