Helicity variation and accumulated flux in the medium arcade simulations for the non-eruptive (top panel) and eruptive (bottom panel) cases. The volume helicity estimations, H_V, are plotted in black, purple, blue, and cyan while the time-integrated flux of helicity, , are plotted in red, orange, yellow, and green. The helicities are computed using the (DV bot, DV top, DV-C bot, DV-C top) gauge sets, corresponding to the (three-dot-dashed, dashed, dot-dashed, continous) curves, respectively.