It depends on how your data is structured. Does each record represent a question with a Creation Date and and Resolution Date? Or does each record represent an action (e.g. question created, question resolved)?
Thanks for your response - it's good to hear from a fellow Texan.
Each "thread" record contains several fields about the thread, and yes, among them are Creation Date and Resolution Date (which can of course be null). I've been able to chart the newly created threads and the threads resolved for each month, but it has been a real challenge to come up with the balance of issues for each month. I'm sure that I need a calculated field for this, and I picked up from one of the training videos (the recent "Calculations II 2-6-2014" recording of a live training) that I need to do a table calculation based on the previous month's record since a month's balance = last month's balance + newly created threads - newly resolved threads. Anyway, that's the direction that I'm heading, but if you have any input or a possible solution, it would be greatly appreciated.