Yeah I have noticed you do that, which is great. Obviously it is a major PITA to really do which sucks. Like I've always said, I wish I was skilled enough to take the daily values provided by the CPC for NAO, AO, PNA and create a rolling bi-weekly index. I'm sure this could easily be done in like Excel but it's not as easy as just taking the daily values, adding, and doing an average. There's way more to it...like if you take the daily values for a particular month and divide by the number of days...the value won't match what the monthly index value is.