Generally Positive IOI's:
[These are some common IOIs for novices in the field that girls will display and that you should look for when engaged in your target. The more signs she shows, the closer you will be to success. The recognition of these IOIs in the field will allow you phase shift easily and more effectively.]

Arm Touching - pretty common IOI. Always a positive sign, more comfortable with you and tends to smile alot around this time.
Deep Eye Gazing - if they hold a direct gaze with you, then they want something from you. Usually show a deep connection she has SPAM. Proceed on in conversation.
The Lean In - girl is quite interested in what you have to say and also wants to get closer to you. At this point you are DHV and also a good IOI.
The Facial/Hair Touch - usually when a girl is touching her hair, lips, straw, or any facial part this is because she is nervous but in a good way. She will have warm feelings for you at this point and is also a great IOI.
Buying You Drinks - quite an easy IOI to pickup on, if a girl is offering to buy you a drink then you are above them at this point and they are digging you hard. Plus you gotta love free drinks
Smiling & Laughing - again, elementary stuff here. If she is laughing at your jokes/humor, and smiling alot, she is having a good time and is enjoying your company.
Preemptive Isolation - if the girl isolates you even before you get the chance, this is a huge positive IOI and allows you to move in much quicker.
Leg Crossing - If a girl is crossing her legs and uncrossing them, usually means she is turned on by you and this bodes especially well for you
Ear Whispering - She is feeling relaxed around you and wants to get closer and more intimate with you. May even be a seduction play on her part.

Discuss and offer other IOIs.

- Cajun