Here is one possibility. We are presently in a wave 4 of 3, then a wave 4 followed by a wave 5. That would complete a first wave down which by that time may have travelled about 3000 points. Today,for instance, chances are real good that no deal can be made given the political hostilities in Washington. A shutdown may give that 5th wave push. Who knows.
This would be just wave one of wave A of a large corrective downturn.