Inside a score, Grade downstream cost, link field or Path Field, reads the other point, directed ends, distance or position along the path. Endpoint pool radius holds blended values flat at the ends and measures grade between the pools.
One of: Other point value, Distance between points, One divided by distance (zero at coincident points), Upstream value, Downstream value, Distance from this path, Downstream position (0 to 1), Downstream distance along path, Value blended downstream, Value drop per horizontal block, Direction (0 undirected, 1 first to second, 2 second to first, 3 both), Signed offset (downstream right positive), Signed curvature (downstream right positive).