SCCamper, you probably already know this but when anchored the shad can remain under the ducer for awhile looking like there's more there than actually is. Also, when you see darker lines especially underneath the shad those would be fish. Your graph may also show fish ripping thru the ball of shad. As long as the fish stayed within the cone the line would continue drawing. Sometimes you'll see the line move up and down while the fish remains inside the cone. Even to the point of coming up to the shad and then dropping way back down. I always enjoy watching my graph when nightstalking.
Health nuts are going to feel stupid someday, lying in hospitals dying of nothing.