The upcoming holiday shopping season is looking strong, according to two leading holiday forecasts.Deloitte’s Retail and Distribution practice expects total holiday sales to climb 4–4.5 percent in 2013. That would be on par with last year’s 4.5 percent gain, Deloitte says.Deloitte senior U.S. economist ­Daniel Bachman said in a statement that ­“rising home prices with steady job ­creation may buoy consumers’ confidence in the economy.”Additionally, Deloitte forecasts a 12.5–13 percent increase in nonstore sales—with nearly three-quarters of those sales coming from online and the rest coming from catalogs and ­interactive TV.Chicago-based ShopperTrak, a provider of shopper analytics, thinks sales will increase by a more modest 2.4 percent.“It’s the fourth year in a row we have growth in holiday sales, but each year that growth has been slowing,” says ShopperTrak