I've compiled life experiences among reading PUA material. I'm still exloring the IOI's, IOD's, IOSI's.
There are three type and also a SOI (Statement of intention)
A IOD is of you all know a woman not showing any kind of interest whatsoever.
A IOI is a indicator of interest that a woman sends off telling you she's into you. The usual number a girl should give is three.
-If a girl gives you one IOI then go up to talk to her.
-If a girl gives you two IOI's then you def. know she's wanting to talk to you.
-IF a woman gives you three IOI's then you really know she's attracted to you.
A IOSI is a Indicator of Sexual Interest. This is when a girl shows you that she wants you sexually and wants to have sex.
A SOI is another IOI in a form to show you what her intention is. SOI is a statement of Intention. SHe could either tell you like, "I find your [whatever] hot\sexy!" something that indicates her intention of wanting more than a friendship.
Here's a list of IOD's I've compiled.
1) When a woman blows you off (obviously)
2) A woman mentions her boyfriend to you alot.
3) A woman ignores you or talks more to her friends than you.
4) A woman gives you a dirty look when approaching.
5) A woman tells you off in a harsh moment.
6) A woman doesn't ask what's your name or anything personal about you.
7) A woman hugs on another male trying to either get you jealous or show you she's not into you.
8- A woman makes fun of you to her friends.
9) When a woman would roll her eyes when you start approaching her.
10) When a woman tells you to go away and leave her the fuck alone.
11) When a woman turns everything against you and makes fun of you because of it.
12) When a woman calls someone on her cellphone or while on the phone with her she'll quickly tell you that her friend is one the line and SHE MUStT take it. This doesn' just happen once but it happens all the time it seems like.
13) A woman that manipulates you into thinking she likes you for example, "I'll be right back dear, I have to go to the bathroom!" then bails out on you.
14) When a woman's voice tonality changes to pissed off.
15) When a woman snickers as you walk by or to her friends.
16) When a woman answer in vague answers.
17) When a woman doesn't make any more plans to meet up with you or doesn't even mention about going on another meeting with you.
18-When a woman doesn't answer the phone more than three times or doesn't even call you back, or possibly doesn't even call you at all to find out what's up!
19) When a woman mumbles under your breath when you try to open her. I had a friend that I would talk to and she seems very pissed off at work everyday. It could be just a hard day or don't like coming to work. However, we sometmes talk but however, if a woman mumbles under her breath about something-it's usually a IOD.
20) When a woman would look away or be distracted.
21) When a woman would seems uncomfortable while talking with you.
22) When a woman tells you that she'll call you when you ask for her number.
23) Now this can be tricky. If a woman tells you she lost your number and reluctanly doesn't ask you for your number again. Someitmes she has really lost it but it's another lame excuse.
24) When a woman gives you a lame ass excuse for making her feel uncomfortable. Another thing is Pausible Denial.
There could be more IOD's that I haven't listed. Here are some IOI's you can tell if a woman's into you.
1) A girl gives a wide smile at you; giving you, "I missed you" look.
2) A girl rubs the back of her neck while talking with you.
3) A girl laughs at almost any rubbish thing you said to her.
4) A girl shows her palms to you.
5) A girl touches you or playful hits you.
6) A girl tells you she misses you.
7) A girl wishes you were over to spend some time.
8- A girl extends to your questions giving you more in detail response.
9) A girl lets you put her hand on ur leg (compliance test). This is usually IOSI.
10) A girl leans into the conversation getting into your personal space.
13) A girl wants to be around you and either finds ways to be around you.
14) A girl will usually brush against you when not necessary.
15) A girl sits close to you
16) A woman puts her knees next to your or brushing against your leg.
17) A woman touches your leg and holds it there for a second.
18) When you guys hug she holds you for about 3 seconds or more.
19) She'll usually ask her friends about you or something to get to know you (if she's shy).
20) If a girl buys you a drink or something.
21) If you hold her hand and sqeeze it and she squeezes back.
22) If she gives you the DBL (Doggy Bowl Look).
23) If she gives you a pet name.
24) If she doesn't mention her boyfriend even though she might have one.
25) If she doesn't show her interest in her male friend or BF and more showing you interest.
26) If she nods her head while smiling when you talk to her. This is showing she is listening carefully of what you're saying and validating what you're saying.
27) If she jokes around with you, making good fun of you.
28) If she flirts with you or teases you.
29) If she finds way to meet up with you sometime or mentions about meeting next time.
30) If she compliments on your look or appearance. "I like..." This is also a IOI.
31) If a girl asks if you have a GF.
32) If a girl mentions your girlfriend but really you don't have a GF.
33) If a girl twirls her hair or plays with it while staring at you.
34) IF a girl adjusts her shirt or whatever to make her more attractive.
35) If a woman tosses her hair back exposing her neck.
36) If a woman moves her hair out of her way also exposing her her face.
37) If a woman gets into your personal space alot.
38) If a woman while looking at you either itches her wrist, shoulder, or cheek.
39) If a woman DHV for you to be attracted to you, this also means she's into you and trying to sell.
40) If a woman tells you personal in depth topics about her life and is usally more opened to you than others.
41) If she calls you hun, dear, sweetie, or whatever in that nature and only calls you that.
42) If she has a sexy tone in her voice.
43) If she looks u up and down or checks you out!
44) If a woman carries on the conversation just talk about anything.
45) If a woman seems excited or happy that your talking to her or being around her.
46) If a woman gets jealous when you're around other women.
47) If a woman does a complainance test.
48) If a woman asks personal sometimes sexual questions just to get to know you more.
49) If a woman sticks out her tounge showing her tounge ring without you asking, or shows you a tatoo on her lower back, or breast, or legs, or tells you where it is that's sexual.
50) IF a woman shares past experiences more than she would with others.
Here are some IOSI's:
1) A woman licks her lips.
2) A woman puts her finger to her lips.
3) A woman rimming the whine glass with her middle finger. Meaning she wants to be fingered or fucked.
4) If a woman plays with the slim part of the wine glass to show you she's thinking about sex.
5) A woman rubs her foot against your leg.
6) A woman placing her hand on your leg or somewhere to get you horny.
7) A woman asking you sexual quesitions like, "What is the freakest thing you've ever done to a girl?"

If a woman adjusts her necklace to draw attention to her tits.
9) If a woman mentions sex to you.
10) If a woman finds way to get back to your place.
11) If a woman rubs her thighs in a way that is sexual.
12) If a woman is hugging you and rubbing your back sexually.
13) When a woman arches her back to show her tits.
14) If a woman spread her legs out in front of you.
15) A woman that will expose her thighs by pulling up her skirt.
16) A woman that is sitting down reveals what she's wearing or maybe nothing at all.
17) IF a woman bends down and exposes her cleavage, while looking up at you to see your response.
18- If a woman gives you a sexy look or something that will get you horny.
19) If a woman sucks on a straw even though her glass is empty. Signaling she wants to suck on u.
I've noticed that if a girl sends a IOSI that your subconscious mind will pick it up and make you hard.
You'll usually get a warm fuzzy feeling in the heart when you get a IOI.
You'll usually get a gut wrenching feeling when a girl shows you a IOD.
Thanks you for reading this and I hope you like it!