Investors interested in Medical stocks should always be looking to find the best-performing companies in the group. Is Align Technology (ALGN) one of those stocks right now? Let's take a closer look at the stock's year- to-date performance to find out. Align Technology is one of 1050 companies in the Medical group. The Medical group currently sits at #4 within the Zacks Sector Rank. The Zacks Sector Rank considers 16 different groups, measuring the average Zacks Rank of the individual stocks within the sect ...