Domain motion and stretching in chevron expander stacks is characterized over the frequency range 100 kHz to 500 kHz. Lateral motion through the stacks shows stable resting positions at the two ends and at the centre of the chevrons with the strip transferring quickly between these. The transfer requires a progressively longer phase angle as the frequency is increased and this reduces the resting phases, e.g. the resting phase at the apex is 45° at 100 kHz, but only 10° at 500 kHz. Transverse expansion takes place principally during the pauses at the ends of the chevrons. The form of the stretching is largely linear with phase, but slows to a limiting value before a lateral transition occurs. The speed of expansion at different frequencies is fairly constant at about 40 m/sec. in the linear region at 40 Oe drive and mid‐bias. However, the linear region reduces in phase‐width at increased frequencies to allow only minimal expansion, combined with a small contraction when crossing the gap between stacks, at frequencies above 400 kHz in these specimens. At low bias the degree of expansion tends to a limit, corresponding to a maximum domain‐tip speed of approximately 52 m/sec. The stretching of the two ends of the strip is not truly symmetrical. At low bias the expansion in the direction of the chevron apexes is slightly greater, and at high bias the situation is reversed. These differences are related to different phase and velocity variations with bias in the two directions.