Forgot to follow up my OP, that although $SPX did close below mentioned level it didn't open the next day even a tick lower to confirm breakdown.
Obviously with seasonality and FED massaging the message if it were to drop it wouldn't be by much before it would come face ripping back.
But face ripping happens both directions and only a long only "trader" looks up - at their peril.
Note that the Dec 6th close below the highest close bar's low was the second time in this move up from Oct 27th. The other time, Nov 9th, same result. Didn't trade even a tick lower the following day.
Clear sailing ... into New Years? TWT