UBS (NYSE:UBS) expects Apple (NASDAQ:AAPL) to have a big holiday quarter and report upside to its $9.90/$38.5 billion estimates.The firm sees a limited impact from the HDD shortage in Thailand and expects conservative guidance. Shares of Apple are Buy rated with a $510 price target.Apple (NASDAQ:AAPL) has potential upside of 19.9% based on a current price of $424.48 and an average consensus analyst price target of $509.09.Apple is currently above its 50-day moving average (MA) of $395.83 and above its 200-day of $373.30.In the last five trading sessions, the 50-day MA has climbed 0.41% while the 200-day MA has risen 0.33%.