Shares of Koppers (KOP) have gained 3% over the past four weeks to close the last trading session at 38.03,buttherecouldstillbeasolidupsideleftinthestockifshort−termpricetargetsofWallStreetanalystsareanyindication.Goingbythepricetargets,themeanestimateof64.67 indicates a potential upside of 70.1%.The average comprises three short-term price targets ranging from a low of 64toahighof65, with a standard deviation of $0.58. While the lowest estimate indicates an increas ...