Here is the definition of the RSf.
'Relative Strength Factor(RSf) is a percentile ranking of the fund's performance relative to other funds and relative the broad U.S. market performance. It is measured over 1 year and weighted to emphasize more recent performance. The values for RSf range from 0 thru 99.99 with the better performing funds having higher values.'
I am going to place in here the top 5 ranked items and then have a more detailed look at the top performer.
Lets have a look at the top listed one DNO, using the chart on the site.
Some Performance detail
For further detail on this fund you can look at this web page