Reverse slider min/max values

I want to create a slider like the below example, with values above 50 increasing the right/green/"good" slider and values below 50 increasing a left/red/"bad" slider.

I created two sliders, and it works the way I want with one crucial exception: the left/bad portion of the slider is backwards. I set the Min Value to 0 and the Max Value to 50, but I actually need the Max Value to be 0 and the Min Value to be 50 so the bad/left slider fills as the value reaches zero.

Is there a simple way to reverse the Min/Max Values for a slider? By default it doesn't let you set a Max Value that is lower than the Min Value. No matter how I rotate the slider, and no matter what direction it fills in, the value 50 is still full when it should be zero.

Thank you so much!