Shares of Potbelly (PBPB) have gained 1.2% over the past four weeks to close the last trading session at $12.85, but there could still be a solid upside left in the stock if short-term price targets of Wall Street analysts are any indication. Going by the price targets, the mean estimate of$17.33 indicates a potential upside of 34.9%.The mean estimate comprises three short-term price targets with a standard deviation of $3.06. While the lowest estimate of$14.00 indicates an 9% increase from the current pr ...