Percentage of the 500 stock components which comprise the S&P 500 index that reside above:
their 200-day EMA their 50-day EMA their 20-day EMA
$SPX daily chart with internals -
* the number of consecutive days the components reside above their 200-day EMA at the 80% level and above is often a relatively small number of days in any given long-term price advance over the years/decades unless it is an unusually steady price advance by SPY and $SPX ... I am seeing some analysts making public statements that this internal metric alone argues for caution once the duration of its state above 80% lengthens
I have 75% marked as the horizontal for vigilance, and plan to leave the value at that location as it has been for many years on this chart