Aurora Cannabis Inc (NASDAQ:ACB) and Lumen Technologies Inc (NYSE:LUMN) are this week's picks for Schaeffer's Cheap Seats: Stocks Under $20 segment. Though in completely different sectors, both stocks have one thing in common -- their soaring price action today. Plus, each were within penny stock territory within the past couple months.At last glance, ACB was up 5.4% at $6.20 after the Canada-based cannabis company's fiscal first-quarter results. The stock has been seeing pressure near $6.30 for roughly the ...