Shares of Rigel Pharmaceuticals (RIGL) have gained 24.6% over the past four weeks to close the last trading session at 21.65,buttherecouldstillbeasolidupsideleftinthestockifshort−termpricetargetsofWallStreetanalystsareanyindication.Goingbythepricetargets,themeanestimateof30.50 indicates a potential upside of 40.9%.The average comprises six short-term price targets ranging from a low of 14toahighof57, with a standard deviation of $17.85. While the lowest estimate ind ...