One you are viewing a suburb you can click on the icons across the top of the data panel. The house icon will display House Inventory. This is a time-series chart showing data for the Statistical Area 3 (Sa3) for houses. Using the Sa3 for trends offers us less volatility compared to a suburb.
Lower levels of inventory will indicate the overall market has high demand relative to supply. What are are looking for in this chart is the overall trend (increasing, decreasing or stable) as well as the most recent inventory level for the Sa3.