Stocks to watch on Thursday: Fitbit (FIT) - the stock is up 5% on some wild excitement over the trade war. Fitbit will likely fall back when no solution occurs in October and the tariffs hit their products. The premium services story remains intact regardless of the tariffs. Buy the stock on weakness until Fitbit breaks $3.50. Slack (WORK) - investors are already buying the weakness on Slack following their first quarterly report since the IPO. Great company, insane valuation. Let the stock come in farther until at least below a $10 billion market value and a $20 stock price. Disclosure: Long FIT