John Ehlers did a fabulous thing when he created his corona charts. Not only is it the most colourful indicator in technical analysis, it also, especially the dominant cycle length, is quite a useful cycle analysis tool.
Get the full John Ehlers article from this obscure russian ftp site:
ftp://80.240.216.180/Transmission/%D0%A4%D0%B0%D0%B9%D0%BB%D1%8B/S&C%20on%20DVD%2011.26/VOLUMES/V26/C11/200EHLE.pdf
I did a tradesignal version of this indicator, download the workspace and save it as template.
download tradesignal workspace
algocodes 