Kinda looks a bit rushed. No offense cause I've seen your gallery, but this doesn't look that good. This also seems to be very out of focus and hard to view. You should try a more darker green color for Tina's skin. Try using some of Virus' pics as a reference. I'd also suggest some inking, doesn't have to be fancy but it would help make the lines clearer.

Just try to put some effort in your trades, and you'll get many more.

Um...I think you should have done better. I mean Virus-20 is one of the best artists ever! and I think you did not put a lot of effort on your half

amazing job x3