So... the title is wrong? Fifty Fifty reached #5, not #4?

the US is the biggest music market followed by the Japanese market. Billboard created more charts trying to include more songs and music genre around the world. that's probably why they have global charts, excluding the US charts and etc. guess they are just trying to be more diverse. so if you are just wondering or being sarcastic, one way or another, Fifty Fifty is doing very good as a rookie group coming from a very small Kpop agency. in short, if they have more follow-up hits in their future comebacks, they will possibly stay and go up. otherwise they will be labeled as one-hit wonder. wish them best of luck, fan or not fan.