I doubt there are any studies, but I reckon people are more likely to swipe it to the closest edge, with the swipe direction perpendicular to the strand.

You might be able to do even better when it comes to tinder. You could change the color, length and texture of the hair based on your personal preference. People with hair similar to the hair in the picture are probably more likely to fall for it, since most hair that falls on your screen is your own.

I'd imagine you should put the hair near the right edge, so people would swipe right since it's the smallest moving distance. Consider how one might hold a phone and the "area of easiest access" for one- and two-handed holding.

Congratulations, you have beat the "80% of men competing for the 20% of women"* statistic.

*My numbers may be off.