Levy 189D(blue)/9D(red)

Shows Relative Strength according to Levy (RSL) for the standard long and an own-defined short time range.
Levy found out that stocks with a division result of the actual quote divided by the average 27 weeks close quotes >1 perform significantly better than the rest.
I added a nine days version to be sure that they are acually comparably strong as in the past. (RSL is more significant in momentum markets.)