To explain why we do not see the nodal plane in the current density, we made use of the same argument as for why we do not see the inter-lobal nodal planes in 2. As the helically propagating nodal planes of HOMO and HOMO-1 is, by symmetry, guaranteed to be mirror images of each other, ψ b will primarily emphasize the current density where the other will have suppressed almost everything and viceversa. Thus, the contribution to the overall current density from one MO-gradient pair has its maximum where the other MO-gradient pair has its minimum.