Change your Tolerance Settings
With SCORE, we will only have values in the set [1, 0, -1]. The tolerance (yellow) range is the range between the start and the end, but it does not include the values themselves. So if we set the Start/End values both to 0, you would never have any “Warning” points. If you set Start / End to 1 / -1 you would have the warning region filling most of the chart. A way to balance this on the chart is to go halfway: 0.5, -0.5, which results in a chart that looks like this:
So you can decide how you want to fill that range.
Now you may save your metric.