Oddlot,
Are you speaking of violation using half span MA's or typical Hurst fld's, in which case I would use (for the 18 day cycle) 9 days displaced forward by 1 day?
And for the 18 day channel (a moving average envelope I assume), how would you set it up? 18 days with what as the deviation?
I will give you a million dollars to go to the library and post some Stockcharts from a public computer, lol.
Best regards,
Lisa
Ps: Photo project went on hold for several reasons-there's always next year. So I'll still be here tugging on your coat tails from time to time.
Pss: Going to go through all your posts today, have them saved.