Parallax comparisons with clusters using the MWSC and DAML catalogues. Upper left panel: cluster median DR2 parallaxes compared with literature: MWSC (red dots) and DAML (blue dots). Upper central panel: same as left panel, restricted to ϖ < 1 mas. Upper right panel: parallax differences for the cluster star sample as a function of G (black dots). Lower left panel: parallax differences for the whole sample. Lower central panel: same as left panel, for ϖ < 2 mas. The right panels are analogous for the whole star sample (black dots). Lower right panel: parallax differences as a function of the colour (G_BP − G_RP). In the right panels, lines show the smoothing for the two reference catalogues for different distances. The red line indicates the whole MWSC, the pink line shows MWSC OCs with a distance d > 1000 pc, the yellow line represents MWSC OCs with d < 500 pc, the blue line shows all OCs in DAML, the cyan line shows DAML with d > 1000 pc, and the green line represents DAML with d < 500 pc.