I wrote about Sweetgreen (NYSE: SG ) previously (14 th June) with a Hold rating as I saw limited upside to the stock given the sharp rally in share price since the start of the year. I am upgradingI am an individual investor that is now fully focus on managing my own capital that I have saved up over the years. My investing background spreads across a wide spectrum as I believe there are merits to each approach, for instance: Fundamental investing [Bottoms-up etc.], Technical investing [historical charts an ...