@TerryH "wth we need negative values for? we need values from zero to 1,000,000. that's all we need. manual interface was much better."
For Galactic Conquest and Galactic Challenge there are many feats where you have to do defeat 3 enemies in the same turn, or apply 10 critical hits etc. These are MUCH easier if the enemies don't die too quickly. When you use negative values the protection can be removed to 0 but the health stays at full until you want to kill them then you switch it to a positive value. Think of negative values as a multiplier reduction instead of increase.
I was entering -1000 manually at times, so either we enter the number manually or he can keep the slider and just change the range but the range has to be allowed to be negative.