A "cluster" of gestures shows a real feeling of connection.
Attraction isn't communicated through one signal but a sequence.
Neuropsychologist Marsha Lucas has a good one to watch for: "After making eye contact, she looks down a bit, gathers or otherwise preens her hair, and then looks up at you while her chin is tipped."
Read more: http://www.businessinsider.com/how-to-read-body-language-2014-5?op=1#ixzz3a7m3BjJn