No longer maintained, alternatives can be found here:
https://wago.io/zQX3l15fu (updated for 1.13.5) https://wago.io/OOm4dJbD6 (updated to Blizzard threat API)
Shows your current threat percentage as provided by LibThreatClassic2, as well as a color indicator (green below 69%, yellow from 70 to 89% and red above 90%).
Credit goes to: Arcaezia for the code to get the percentage (https://wago.io/p/Arcaezia). Juaninazee of IPS (Mankrik) for the coloring part. LibThreatClassic2 for the library (https://github.com/dfherr/LibThreatClassic2).