A pair of homebuilders in the Spotlight triggered sell signals Monday before fighting back to a decent close. D.R. Horton (DHI) erased all of a 12% gain early Monday past a 28.80 cup-with-handle buy point. It’s prudent to sell before all profits are gone on stocks that can gain at least 10% past a buy point. The stock broke out in heavy volume on July 30. D.R.