[pcabc]

I'm currently looking at whether the % stocks which have the Mansfield Relative Strength above the zero line and whether the zero line is rising is a useful breadth measure.  These additional calculations are very slow and I'm trying to work out whether I have bugs in my code or whether this is not a very useful parameter to measure?

Weekly Mansfield RS Above Zero Line is one of the ten conditions of the SATA score. However, a rising MA is not a requirement as it often doesn't start rising until months later.

Interesting, as I recall I think where you managed to interview Stan Weinstein (what a coup) where the there is a requirement for the Mansfield RS zero line to be rising? I've searched but failed to find it. Yes, it can take a while to move up.

You also need to make sure that you are adjusting all of your data for splits and dividends, as any calculations will be wrong otherwise, as unadjusted data breaks the various indicators. Especially if any rely on high and low data points. i.e. breakouts and breakdowns measures, or resistance levels.

Yes, I'm using data adjusted for splits and dividends. It is quite annoying as although I use the adjusted close value to scale the open, close high and low quite early when I'm processing the data it is an extra complication that trips you up from time to time. I may have to make an artificial pool of a few stocks to manually check as the data I'm calculating right now for %stocks with a positive RS and also zero line rising seem to vary little.