A major breakout is underway in Stantec (STN.TO) shares. Yesterday, the shares rallied up off of their 50-day average, staged a breakaway gap to the upside and soared to a new all-time high on a spike in volume, all combining to indicate a surge in investor interest. Measured moves from recent trading ranges suggest potential upside resistance tests appear near $83.50 and then $84.25. Initial support appears at the bottom of the gap near $61.50.