Set the Stabilisation variable to a number before pressing the flag. After that you can change the Variable input, and see how the stable the output is (top right). The Instability sets the variation in the input. For example an input of 50 with instability 1 will range from 49 to 51. A higher stabilisation means a more stable output, but it also means it reacts slower to a change in the input.
As always, feel free to use this in your own projects :) This was designed as a test. I am trying to stabilise an input on an arduino from a gyro sensor, then use that input to control an electric bike to automatically hold a wheelie.