One you are viewing a suburb you can click on the icons across the top of the data panel. The unit icon will display Unit Inventory. This is a time-series chart showing data for the Statistical Area 3 (Sa3) for units. Using the Sa3 for trends offers us less volatility compared to a suburb.
Higher levels of inventory will indicate the overall market has low 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.