Great work

just wanted to talk a bit about where you can take this in the future (right now getting it working on all the other users PC's is more than enough of a headache

)
EliteOCR can save the commodity info as a flat text file, eg:
Code:
System;Station;Commodity;Sell;Buy;Demand;;Supply;;Date;
Summerland;Henry O'Hare's Hanger;Hydrogen Fuel;90;94;;;182399;High;2014-12-30T03:06:18+00:00;
Summerland;Henry O'Hare's Hanger;Clothing;393;;34787;Med;;;2014-12-30T03:06:18+00:00;
so you'd not need to get your head round what the python code is doing, just pick one of the export formats it supports and write and import routine.
the BPC format might be the best to use as it's designed to work with Slopey's Best Profit Calculator, and what that says to me is the format has more chance of staying stable as it's for a 3rd party
in fact it would be interesting to see what you and slopey could do if you got your heads together. slopeys crowd sourced data combined with your game overlay and rich set of tools would be a real winner!
seeing as how excel is quite limiting what with the cost and all, and open office even more limiting with the VBA it supports, have you thought of porting your code to either .Net, or if it's easier VB6? i've done well over 10 years worth of VB6 and VBA coding, and i've really enjoyed the brief amount of time i've been able to spend in .net (ok, one project involved working with a laser, so that made me biased

). i'm impressed with the way you've been able to create the UI, i had no idea excel was capable of overlays like that! guess it just goes to show, if you never get a requirement to do something then you might never know a certain feature even exists.