One has to think of the longs as a static 18th century army that is lined up in a battle formation and the shorts as a skirmish line that attacks here and then attacks there causing a few casualties in one place and disarray there. How can you be sure that it isn't being moved up by those who quickly change positions when resistance is hit and then move in the other direction! Think of the short trades as gorilla attacks not as long duration battles involving large numbers of armed combatants!
I'd say we just knocked out any shorts that are going to get knocked out. The problem isn't squuuueeeeeeeeezing out the shorts it is keeping them from taking control. They actually have the upper hand here and if Isis breaks we could see $12.00 a lot easier than $16.00.