re: trusting the chart, if not many traders are paying attention to the 9ema/20sma,
then trusting that aspect of the chart to rebalance
means trusting that the ones who are paying attention have market control over the ones who aren't?
one could argue the october rally was staged to avoid the cross
as it certainly inflected the 9ema strongly upward just before it would have crossed.
but that seems a big assumption, yes?
when a simpler answer might be that banks and other deep pockets got caught with their pants down end of august and needed to get back to 210 to shore up their books.
eg: the fed reverse repo chart that shows $650 billion in bank defaults in september.