Being a new member of ET, I am fascinated by the diverse range of personalities who respond to the OP's simple question. But I like it.....free speech. Of course, if we discussed things this way in person there would soon be busted noses and loose teeth afterwards.....I've done that too, and this is better.
I would say that the most volatile markets are the ones that will require the most margin. Look for the ones that have seen a recent increase in margin requirements and those are probably the ones seein increasing volatility.
Look I rarely post but almost all of my posts, I try to help. But this op sounded arrogant and acted like he is entitled to something.