This indicator isn’t on ProRealTime by default !
This is the code, very simple.
// Type histogramme
ChaosAO=Average[5](MedianPrice)-Average[34](MedianPrice)
// Chaos Awsome Oscillator Signal Line
ChaosAOSignalLine=Average[5](Average[5](MedianPrice)-Average[34](MedianPrice))
RETURN ChaosAOSignalLine COLOURED(0,0,255) AS"ChaosAOSignalLine", ChaosAO AS"ChaosAO"