Daily ex-post prices ($/GJ) for the AEMO Short Term Trading Market hubs. STTM Avg is the unweighted mean of SYD, BRI, ADL.
Sum across all three hubs, 7-day rolling mean. Years overlaid on day-of-year so seasonal shape is comparable.
Hub selection above filters this chart (physical hubs only). Colour = hub, line weight/dash = year age.