The best Fibonacci wave relationships probably occur in the 2030 - 2034 SPX price range as noted on the chart below. This price range would likely take prices back toward the upper channel line.
There is of course the possibility that when Monday comes there may be higher volume due to end of summer vacations and that prices will decline rapidly in a small wave three down of some degree. Since there is not much price room to spare, the two counts presented tonight are practically diametrically opposed.
So either way, we'll get a good idea by midday Monday trading which way its going. I generally lean toward the 2030 - 2034 interpretation.