Key TakeawaysApple shares are in the spotlight Monday following news that Berkshire Hathaway once again trimmed its stake in the tech giant.The stock traded within an ascending triangle between July and October before breaking down below the pattern’s lower trendline late last month.Investors should watch important support levels on Apple's chart around $218,$198, and $181, while monitoring key overhead areas near$233 and $270. Apple (AAPL) shares are in the spotlight Monday following news over the weeken ...