Here's a copy of a couple posts on Yahoo board that continue this discussion...

Hi Loren

TR and a few others have been concocting rolling osma's etc . I have missed most of the emails & posts for the past couples of weeks or so and I am having trouble trying to catch up with the progress that has been made so far. Have you had the chance to examine TR's rolling osma and results?

My original (& overly simplistic) idea was to create an array of daily values, updated each day. The weekly data would then be developed each day with week[0] being ohlc of days 0,1,2,3,4, week[1] being days 5,6,7,8,9 etc. So week [0] open is really day[4] open, week[0] close is day[0] close, week[0] high is the highest high of day[0] to day[4], week[0] low is the lowest low of day[0] to day[4]...etc That weekly data (which would change slightly each day) would then be used to calculate daily the ema's & osma for the past number of weeks.

Multiplying indicator values, or adding and averaging values to simulate other periods works for some simple indicators such as sma but does not work for most indicators or osma. This is why fresh "weekly" values need to be calculated daily and fed into the weekly osma calculation each day.

Thanks for giving some thought to this as I believe it is important to test different variations on this theme.