(KC) is a banded index similar to Bollinger Band and Envelope Band, which consists of three lines: upper rail, middle rail and lower rail. The middle track is the moving average of user-defined time period, which usually adopts simple moving average or exponential moving average. The upper rail and the lower rail are set at a certain distance from the middle rail (user-defined). It can be set as a multiple of the highest/lowest amplitude in a day, or more commonly, a multiple of the average true amplitude (ATR).