D Value Area in Ninja trader Different from TPO Chart

Hello and thanks for looking,
I am planning to start trading based on Market Profiles VALUE AREAs. I basically just need to see what the Value Area low and Value Area high is for the previous day and then base my enter/exit based on where the market opens the next day.
My problem is that a good TPO Chart for Ninja Trader costs $249 which is a little bit too pricy for me for just testing TPO and Volume Profile Chart for NinjaTrader
I found a plugin called dValueaArea for Ninja Trader for free.
DVALUE AREA 1 NinjaTrader Indicator
However, it gives me slightly different values than what my friend gets on his TPO Chart from FinAlg.
For example what he gets are these:
Value Area 3/6:
VAHigh 1345.00
VA Low: 1340.00
POC: 1341.00
What I get is:
Value Area 3/6:
VAHigh 1346.00
VA Low: 1340.75
POC: 1341.00

They are slight different, unfortunately, and even one tick makes a big difference.
Would anybody know how to set the dValuearea plugin so that I get the same values?
Here are screenshots of available settings:
ImageShack® - Online Photo and Video Hosting
ImageShack® - Online Photo and Video Hosting
this is what it looks like:
http://img191.imageshack.us/img191/4297/dvalue.jpg

thanks for the help!