Total Tickets Sold Yesterday (for *real)

Hello friends-

I've got a widget for total tickets sold yesterday. I'm currently using an Order Date filter with Date=Yesterday, but I think I may need an adjustment because it includes things like a subscriber exchange. For example, if a subscriber exchanges a pair of tickets out of one performance and into another, then my widget says I sold 2 tickets. I'd like for the widget to say 0 because technically, I didn't sell any tickets yesterday. It was just an exchange. 

I've played with ticket type, and that didn't do it. I was trying to do something with Order Value because maybe if the order value was greater than $1, it would include only the true sales. Have you faced this? Any advice?