Mean-centered Hα velocity versus mean-centered CMHRV. Colors encode pulsation phase, arrowheads show the direction of increasing phase, and the dashed line is the identity relation. The small cross in each panel represents the adopted 0.10 km s⁻¹ radial-velocity uncertainty. Labels give the formal polygonal loop area. Connecting lines are interrupted across phase gaps larger than 0.15, therefore, no complete area is assigned to YZ Cap.