I don’t know anything about him, but I like how Campbell lists the 1994 buy signal that turned out to be a questionable call.
Because our market is so credit dependent, my favorite housing forecast is the national debt service ratio. The data only goes back to 1980, but it has a good correlation with local real estate with a 2-4 year lead. I would never just use one data source to make a decision as large as purchasing a home, but this is my favorite.
Economagic has the best chart on this data, but I was unable to link it. Google “debt service ratio” for a variety of nice charts.