The y-axis is the win-lose difference.
The chart is base on the Results.

China

-13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 XQ JDG Newbee GEN.G Nova WE LGD W.EDGM