Help with Max Pain??

HI-

I am having a private correspondence with another member on max pain levels for this Fri.

From [url]http://leavittbrothers.com/blog/?p=5346:[/url] I have IWM=82.3; QQQ=63.05 & SPY = 134 to 135.4 (this post appears to be based on EOD Feb 13 data).

Another member using Option Oracle ran numbers near the close yesterday (Feb 15) as: IWM=80, QQQ=61 & SPY=131

Q1: Are one of the data sources more correct?

Q2: Can the max pain move much (1%? 3%? 5%?) over a 2-4 day period in the last week (assuming normal market conditions, e.g. excluding Fall 2008 in which lots for 3sigma events happened)?

Thanks,

Shawn