Key TakeawaysBroadcom shares tumbled nearly 7% in extended trading on Thursday after the chipmaker posted fiscal third-quarter results that topped expectations but issued light revenue guidance for the current quarter.The stock sits positioned to break down from a symmetrical triangle pattern on Friday following the company's weaker-than-expected sales outlook, potentially starting a new trend lower.Investors should monitor important lower price levels on Broadcom's chart at $141, $120, $104, and $91. Broad ...