We present new spectroscopic observations of the Be/black hole binary MWC 656 obtained during the period 2015–2021. We measure the equivalent width of
Hα (
EWα),
Hβ (
), and the distance between the peaks of
Hα (
),
Hβ (
), and FeII (
) lines. Combining new and old data, we find that: (1)...