Well it didn't get the memo that it was supposed to go UP from that open, not down, but anything below 218 right before the close would be a buy for me. It's still oversold at that level. I only add when the price is cheaper than my last purchased lot, though, so at 218 I'd just stand pat with what I already have. We could see a push upward before the close and at any price ABOVE 218 I'd sell that lot purchased at that level.
I'll update this definitively after the London close, since things could go either way at this point.