Many of us occasionally look at an impressive stock that we don't own and wonder, "How much would I have today if I'd invested in it some years ago?" One company that those in the know might wonder about is Intuitive Surgical (NASDAQ: ISRG) -- a giant in the robotic surgery arena.

After evaluating the trading volumes and Open Interest, it's evident that the major market movers are focusing on a price band between $450.0 and $670.0 for Intuitive Surgical, spanning the last three months. Looking at the volume and open interest is an insightful way to conduct due diligence on a stock.

But despite all the bullish reasons to be optimistic about the company, the stock has been trading lower since it posted its latest earnings numbers on Jan. 23. The issue at hand relates to the threat of a trade war, which could adversely affect Intuitive's business.