Nikola (NKLA) is one of the stocks most watched by Zacks.com visitors lately. So, it might be a good idea to review some of the factors that might affect the near-term performance of the stock.Over the past month, shares of this pioneer in zero-emission trucks have returned -15.9%, compared to the Zacks S&P 500 composite's +2% change. During this period, the Zacks Automotive - Domestic industry, which Nikola falls in, has remained unchanged. The key question now is: What could be the stock's future directio ...