We have created a new table in NetPerfMon that stores actual transaction counts for many of our processing centers. Is there a way to have Orion graph the information in this custom built table? It's not really SNMP gathered statistics, it's just a table copied from another database.
Not really. Orion is flexible, but it's not a general purpose graphing tool.
I believe you can hook up MS Excel to an external data source like SQL - that might be a good way to generate your graphs. You could even use its VBscript automation interface to regenerate the graphs on a schedule.