Shares of Rigel Pharmaceuticals (RIGL) have gained 5.9% over the past four weeks to close the last trading session at 22.08,buttherecouldstillbeasolidupsideleftinthestockifshort−termpricetargetsofWallStreetanalystsareanyindication.Goingbythepricetargets,themeanestimateof32 indicates a potential upside of 44.9%.The average comprises six short-term price targets ranging from a low of 20toahighof57, with a standard deviation of $16.52. While the lowest estimate indicat ...