I took a screenshot of the post-game score analysis graph from one game and measured the pixels to try to figure out why it sometimes looks distorted to me (e.g. if the score is W+1 at one point but W+2 at another point, but visually it looks like the graph is x3 or x4 more in white’s favor). What I discovered is that the graph is fairly accurate, but the blue line has a value of perhaps 2 or 3 pixels that creates an optical illusion when the width of that line is a high % of the height of the graph, which happens whenever there is a big swing in the score. So for example if you have a game that was B+25 at one point and W+4 later, W+4 is only ~16 pixels and the difference between W+1, W+2, etc. are small enough that the width of the blue line accounts for most of it.
What I suggest if OGS is ever interested in fixing this is to make the score analysis graph twice as tall. That wouldn’t hide any of the analysis tools, or the frame the shows the variations, but it would practically speaking make the width of the blue line a non-factor in visually estimating the scores on the graph for most users in most games.