Wattpad tries to provide as many genres as it possibly can, but it's limited. To fix this, many people have started accounts for non-official genres, or Wattpad themselves have. You might find out your story is a genre you never knew it was ;) Some of them may mix with movements because they want more stories of this type written, but it's more like sub-genres than movements.

Examples of alternate genres are Urban Fantasy, Steam Punk, Retellings, and so on.