one needs to be careful how they recognize IOIs because as you know women of high calibre (+7.5) can send out flirtatious gestures without realizing, so look for gold standard IOIs e.g. she asks leading questions, she initiates kino etc.

Now a girl like that thrives on high male attention and is used to men idolizing and praising her, putting her at DHV (which is what AFCs do). so you have to be different and place her down to a lower status than you (DLV).

in order for you to get her really in to you, you must build attraction and rapport with her. attraction is fast with the right combination of positive and negative validation (push pull technique) i.e. if there's something u like let her know that u approve, if there is something u dont like about her show that u r not impressed. there's also negging and teasing as well. but these attraction techniques should be used depending on the type girl u r dealing with, these are purely for girls of high calibre (hb7.5 and up). but some men dont realize that u should use positive first and then negative validation on the girl because if u use the negative first then u will just end up hurting her and be perceived as an asshole. A mixture of positive and negative validation (push pull technique), negging and teasing can create impact and fast attraction, showing that you have high standards and that she has to work to gain your approval and not the other way around.

in your case, you should show her disapproval, tell her something which u dont like (what she is doing, wearing etc). girls like her have very high egos, and they respond very quickly when someone challenges their egos which then forces them to seek approval as you're the one judging them and comparing them to other girls. make her work to gain your approval.

there's also building rapport to emotionally connect with her, talk about things which have deep emotional content, being empathetic with her, imagine what it is like to be her, tell her how would u feel if u were her doing that activity or something. from this she would perceive u as someone who is really trying to understand her, someone who is deep and can have a great conversation with instead of trying to get into her pants lol. all the men that you see on her facebook dont do this at all and do not understand how much empathy is a powerful force and openly allow themselves to be perceived to see this girl superficially. you can use the concept of 'rapport' to ur advantage as well.

hope that i have helped. Happy gaming dude