I normally don't buy a stock based on discounted cash flow analysis, in APPL's case there is a nice convergence of sentiment, cash flow analysis, technical oversold conditions plus the floor that is created by the cash pile+operating cashflows combined with management willing to buyback stock (and give dividends)
It could get more oversold which is why I'm scaling in. I don't have a stop there. If I had some guts I'd have a huge position there but technology is just not my area of expertise