@TheChartiste "the question is about universality of zero line for both as there is one imposed of another." GOOD question. You're better equipped to answer your own question (based on math & on your own now-extensive investigation of KST) but my "more or less 'intuitive' " guess is that *** YES *** : ALL "KSTs," in cases of multiple indicators plotted simultaneously like this, are expected DEFINITELY all to relate to the SAME zero line in the SAME way! @davechiba