There are plenty of red flags surrounding the business.Walgreens Boots Alliance (WBA 0.92%) slashed its dividend earlier this year. The company's earnings numbers haven't been great, and it is in the midst of launching healthcare clinics at its stores as part of a costly move into healthcare. It has been a tumultuous time for the pharmacy retailer, and investors can tell that just from its stock price: The last time Walgreens shares were trading at these levels was in the previous millennium.There are signs ...