I’ve been confused by this as well. I’ve just compared two time periods:
Example 1
Example 2
Even though S2 (Z3+Z4) is emphasized less in Example 2 its classified as Threshold.
With the code you posted - is the logic for deciding if it’s Pyramidal correct? The higher S1 (Z1+Z2) is the less chance it has of being classified as Pyramidal.
It looks like the s1 < 3.01 * s2 PYRAMIDAL check could be wrong to me.