Something I remember Jaz saying once about IOIs....if you're conciously looking out for them, they will fuck up your game.

Besides IOIs are ambiguous, we are often led to believe that IOIs are sure-fire signs of attraction...sometimes they are not and girls give off signals that are purely incidental and therefore misread.

Instead of concerning yourself with 'Indicators' that can often be unreliable you should be prepared to know exactly where you stand with 'Affirmations of Interest' (AOIs) i.e.
something that is affirmed; a statement or proposition that is declared to be true.

This is very simple ask a girl for her number, she says 'Yes' (Affirmative)
Ask a girl out, she says 'Yes' (Affirmative)

This is much more time efficient and reliable feed back than looking out for 'hair touches', 'wrist scratches', 'dilated pupils' or analysing word for word what a girl says to you.