thank you for the welcoming greeting NAV. I have kept up
with your blog content and your content posted here over the recent months & years.
I am interested in how the cumulative Advance-Decline breadth lines for the SPX, the NDX, and
the NYSE common-stocks-only data set develop in the coming weeks and months. I usually plot
for each cumulative Advance-Decline breadth line these Bollinger Band tools at a minimum:
50,2 BB
50,2 %B
50,2 BB Bandwidth
the Bandwidth since early July or since mid-July depending on the index whose
A-D line is being viewed reflects a lower period of A-D line volatility than seen for much
of 2018 as the A-D lines are not too distant from their upper Bollinger Band but also
not rising by enough distance to expand the Bollinger Band.
The length of this
period of basing near but not above the upper level of the BB channel combined with the actual July/August 2018
value of the BB Bandwidth viewed in comparison to the Bandwidth highs and lows since 2016 is
somewhat striking in the Bandwidth comparison for the S&P 500 A-D line.
I note that JAB's definition for Bandwidth incorporates an explanation that lower volatility periods
are followed by higher volatility periods.
So, we can use other tools to divine whether the Bollinger Band expansion that eventually next occurs for the S&P 500
cumulative A-D line is likely to take price action and the Advance-Decline line to new heights or back toward the BB
midline or lower.
Summary for status of A-D line BB Bandwidth using the daily 50,2 setting and using StockCharts.com as the data source:
S&P 500 - Bandwidth peaked in mid-June
Nasdaq 100 - Bandwidth peaked in late June
NYSE common-stocks-only - Bandwidth peaked in early June 2018
Edited by hiker, 03 August 2018 - 10:35 PM.