The music world is replete with many hideously stupid genre names, but that's got to be the worst I've ever seen. The only way that name could be in any way redeemed is if the genre it was describing was actually satanic sea shanties.
It's got something to do with New Wave. It's a kind of umbrella term that originates from the late seventies/early eighties when the definition of genres like punk, post-punk and new wave were still pretty fluid. Originally it referred to the original goth rock artists like Bauhaus and Siouxsie and the Banshees, as well as bands that we now generally think of as post-punk, such as Joy Division, but also to things as diverse as Anne Clark and Cocteau Twins. It lived on with a lot more popularity as a genre name in Europe (see, for example, the Wave-Gotik-Treffen festival in Germany) and nowadays generally refers either to bands that exist somewhere in the middle of a spectrum that might have goth rock as one of its ends and EBM as the other end, or to the more goth ethereal bands, depending on where you are and who you listen to. I've seen it variously applied, nowadays, to everything from The Cruxshadows to Sopor Aeternus. Basically it's become a catch all for bands that are obviously shitting-bats goth, but aren't easily put into a genre. Indeed, I would probably classify my own musical efforts as Halo of Flies as Darkwave/Post-Industrial.
Given its connections to coldwave, futurepop and EBM, dark trance isn't a bad guess. Depending on your mood/tastes/opinions you could easily call
this darkwave (or futurepop, or EBM). Basically, goth genres are fucking confusing.
Actually, posting this has reminded me of the existence of the Swedish EBM scene. Scapa Flow, old Cat Rapes Dog, Pouppée Fabrikk and Spetsnaz all have good tunes.