If I see fish show I will move onto them.
Not all shows are obvious either; I have seen what I thought was a swirl, just a circular ripple, almost like feather going round three quarters of a circle, and caught from it.
The head and shoulders, jumping are obvious, easily seen, but not all indicate carp feeding on a spot. I have seen fish head and shouldering, but the catching spot was 20metres to the left of it. I think the fish were digging into the silt, feeding, then coming up to clear their gills.
Other times the dolphin type shows were carp moving onto a feeding area.