Recently got Level 2 Quotes Just a Quick Question

http://ift.tt/2aMJlcQ Could anyone tell me what red vs green means in this? This is the quote where it tells you the volume and time of sale of the stock, but I'm confused as to what each color means. By the way for only 50$ you can get free real time quotes+level 2 from Think or Swim.

Submitted August 11, 2016 at 12:18PM by ZomgJames http://ift.tt/2aOfJPj