Do we have an accurate method for determining change in score? I know the FG Statmasta does, but the formula is hidden. I know that delta-score can be calculated using the electrum won, but that's all I know.
Of course, the low-tech way to determine delta-score is to record your score at the beginning and end of a testing session. Yesterday, I was bouncing between leagues, so the "record the score" method would be more tedious, but I can avoid that just by sticking with one league.
Tracking delta-score has never been important to me, really. My score goes up or down, and I find myself able to buy different things for my Arena decks, but tracking details really doesn't matter (and I can bee really anal about stats, so that's saying something). If y'all want me to track delta-score, I will.