Your chick could definitely be a Black Sex Link chick, but then again there are several breeds that also look virtually identical to this one as well. I would recommend posting its pic again in about 5-6 weeks. By then the breed and gender should be pretty obvious. If it is a Black Sex Link, it is a female as male BSLs have a white spot on top of their heads. I hope for your sake it is a Black Sex Link as they are friendly and hardy, egg laying machines. )In the photo with two in my hand, she is the one protesting. I used this to compare: she is about 10 days old, the other chick, an Australorp, is three or four days.
In the "top view" you can see that she holds her wings out a bit, , and the one where I'm holding her, it shows best her wing, leg, etc.
Any ideas?