After gapping up in mid-May, Viking did what lots of stocks do after a big gain - it came straight back to touch the 13-day EMA. Now, this doesn't happen every time, and you probably would only have been aware of this if you had either entered in a position on the day it gapped, or threw VKNG on your Watch List and then noticed the oversold condition on your Focus page.

Stochastic was classically oversold in late May. This afforded a very timely trade. This trade banked on the fact that the gap was going to hold up. Really, the volume that brought the stock to stochastic oversold was very small compared to the volume that drove the stock up on the day of the gap.