Mass ratio as a function of the orbital period of the multiple systems characterised in this work and in Baroch et al. (2018), colour-coded by the pEW(Hα). The circular, triangular, and square symbols correspond to SB1, SB2, and ST3 systems, respectively. The upward arrows indicate the mass ratio limits for the systems for which only upper and lower bounds to the secondary masses could be given. The outer and inner orbits of the ST3 are plotted as individual binaries, with the same pEW(Hα).