Monthly chart is suggesting $400 is more likely than $500. Swing traders can watch a possible bounce at $443 as the magic number for bottom out but if you are a long term investor you may wait more solid long entry at $400.
400 def. seems like it's possible, but you are suggesting it could be the bottom there simply because 400 is a nice psychological area. Though bear in mind, I'm not disagreeing with you, 400 is def. a support, I just can't agree on whether it will be the bottom yet....until it is a bottom.