1 - PC/share is the point you trade around in AIM.
standard deviation only applies to the Normal curve true. the prices from a time series, and i had problems finding the sigma for a time series :). So i used one of the sigmas in excel.
2 - i dont use negative hold zones, in some tests it did not work well for me
3 - the safe formulas are used for the hold zone. you also have the minimum buy/sell which can vary independently from the safe percentages.
4 - for hold zones i would incorporate the minimum buy/sell into the safe % to use for the complete hold zones.
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