The Game Flow stat is complicated but the chart is fairly simple. Each bar represents a minute of game play. The height and direction of each bar represents how much each team did to increase its chance of scoring. Interesting to me in that it indicates we finally started to outplay Orlando after the Mueller Free Kick, except we gave up that huge scoring chance to Akindele, and then continued to control play to no avail.
I also notice a fair number of minutes with no visible bar meaning that neither team did anything to create a decent chance, which I guess is an indication of a boring game.
Finally, Opta indicates a fair result would have been a 1-2 loss.