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”