My guess just stops under $5.00 getting taken out, causing a sell off .. If so, we will see a suspicious looking rebound in the last hour as the buying kicks in.
Not certain but if there isn't any news after hours I am going to speculate that it maybe some shorts bringing it down ahead of covering which happens later this week typically.
Just a hunch. I expect buying to bring the pps back up by weeks end but there could be other factors I am unaware of.