Comment by fundamental

If you want to have ragged starting information displaying pricing information for the various symbols in the range they're defined, I'd assume it's much more common that there's different start dates, but they're all defined for today. So, you could have a single checkbox to normalize based upon equal value at today's value and I'd default to having that on. As your baguette argument about the absolute values not having huge significance still applies it seems like it would work with no other modifications (i.e. it doesn't matter that it could require fractional shares and the like).