What is the "Record High Percent Index" and how is it calculated?
StockCharts Support January 26, 2009
The Record High Percent Index is a market breadth indicator created
by dividing the number of 52-week highs for a given market by the sum
of the number of new highs and the number of new lows.
Record High Percent = New Highs / (New Highs + New Lows)
The values range between 0.0 and 1.0. A value of 0.0 means that there
were no new highs on that day. A value of 1.0 means that there were no
new lows on that day. A value of 0.5 means that the number of new highs
and new lows were equal.
StockCharts.com computes and publishes three versions of the Record
High Percent Index - one for the NYSE ($RHNYA), one for the Nasdaq ($RHCOMPQ),
and one for the American Stock Exchange ($RHXAX).
More information on the Record High Percent Index is available in this ChartWatchers article.