Daily Trader: AAPL Leads Stocks Sold Into Strength Yesterday (The Wall Street Journal) Apple topped the Selling on Strength list yesterday which tracks stocks that rose in price but had the largest outflow of money. Selling into strength is a proactive trading strategy carried out by selling out of a long or into a short position when the price of the asset being traded is still rising but is expected to reverse in price. This doesn't bode well for today's trading session.