Shouldn't the fitting be done only on the old data?

[fredthedead]

If the model is being fit on the historical data + new data, doesn't it mean it'll perform less accurately when tested?

surpriver/detection_engine.py

Line 203 in 5241766

detector.fit(features)

surpriver/detection_engine.py

Line 204 in 5241766

predictions = detector.decision_function(features)