Real estate markets do not move randomly, they move in phases: recovery, expansion, oversupply, and correction. Each phase has a distinct signature in the data, and each one calls for a different conversation with buyers and sellers. The agents who get caught flat-footed are almost always the ones treating every quarter like the last one.
The two indicators worth watching every month are months of supply and days on market. Months of supply tells you whether you are in a buyer's or seller's market, and how fast that balance is shifting. Days on market tells you how urgently buyers are moving, which is often the first thing to change before price does.
The signal most agents miss
Price is a lagging indicator. By the time median price has clearly moved, the shift that caused it has usually been visible in supply and demand data for two to three months already. Watching pending sales volume alongside new listing volume gives you an earlier read: when pendings rise while new listings stay flat, inventory is tightening even though list prices have not caught up yet.
Top agents translate this into client conversations before it becomes obvious. A seller in a tightening market does not need to be told to drop price to sell fast, and a buyer in a market with rising months of supply does not need to rush an overbid offer. Bringing the data to the conversation, rather than an opinion, is what builds trust when a client's instincts and the market disagree.
None of this requires a data science degree. It requires checking the same three or four numbers every month, for your specific zip codes, and noticing the direction of the trend before the trend becomes the story everyone else is telling.
Derek spent a decade in mortgage-backed securities before moving into real estate market analysis. He writes about rate cycles, inventory trends, and reading the data before the headlines catch up.