Not one click per test but one click at a time. Each test is 6-8 minutes in length. I shoot on average of 30 shots per test. The key is to not pull the shutter pardon the pun when the horse is close. The arena is 20m x 60m so there is room to work the ends and across.
RRRoger brought up some good points. In outdoor arenas I can shoot from farther back. Indoors I am limited of course. but some good points.