Here's a follow-up weekend chart of the S&P 500 from Serge. This one is a monthly view over the past decade that focuses on the Rate of Change indicator. Serge explains:
Like in 2004 and 2008, ROC9 broke support before the index (see 1, 2 & 3). Watch also ROC24 to see if it will break its support at the same time as the index, like in 2008 (4). Take note too that the sideways trading range varied in length from 4 months currently to 9 months in 2008 and 11 months in 2004.