I've already watched Supergirl on Netflix twice and have now started with Arrow and I'm on season 4, episode 23, and I've read that Arrow should also have Supergirl. So because it should occur. Should I wait with Arrow season 5 until Supergirl season 5 comes out or can I keep watching?
No, there are only annual crossover events from Flash, Arrow, Supergirl and DC Legends, these consist of 4 episodes, each series then has a part.
The Arrow series has no plot with Supergirl.
Simply skip the crossover event as a result and keep watching.
