A market chart is a starting point for questions. Before applying a number to your own move, ask what place, time period, and kind of property it describes.
Are you looking at asking prices or completed sales? An average or a median? All homes in a city or properties comparable to the one you are considering? How many transactions are behind the figure?
An old post can help explain what someone was watching at the time. It should not stand in for current information when you are setting a price or deciding what to offer.
Bring me the chart or headline that prompted your question. We can identify what it measures and what more specific, current information is needed for your decision. This guide intentionally contains no market forecast or current price claim.