This image shows cash on the left and futures on the right.  With regards to symmetry from the Feb 16th highs cash has not broken the symmetry high bounce of 41 points from Feb 21st.  However ES futures did break symmetry the following day with about a 50 point bounce (which lead to a higher low).  Again since ES trades overnight those moves when the highs and lows are counted can be larger than the cash and you can have situations like this where one broke symmetry and the other did not.  If you play symmetry on SPX good to also monitor Futures as well and vice versa.