Excellent. Glad you went and charted her. There are several stages that a horse can go through emotionally....going from extreme fear to extreme dominance, we have catatonic, right brained introvert and extrovert, unconfident, confident, dominant, anger, rage. My warmblood, for example, was in the Anger stage when I got him a little over a year ago. He hated people. But that's another story! lol.
So, for your little horse, if she's a RBE (right brained extrovert) her behavior is fear based...self preservation. So it sounds like a lot of the time she isn't full blown RB, she's just unconfident. This is actually a good thing because it's easier to handle. So yes, when she is unconfident SLOW DOWN and take a lot of time. Watch for her to brace up and when she does RETREAT. If you put pressure on a RB horse they will blow up.
Now, if she goes fully RB you need to match her energy, then add some and interrupt her pattern by doing tons of changes of direction, going sideways, backing up, transitions, SOMETHING to interrupt her RB pattern. DO NOT let her go forward forward forward, that will only add fuel to the fire. Why do you think a lot of Arabs and TBs can just go and go and go and go and go on a lunge line for up to an hour and STILL be fired up when the rider gets on? I've seen that happen...not pretty.
So.....if she goes fully RB she needs you to interrupt her pattern. They key here is to not let her go there....you need to have zero tolerance for RB behavior, you need to act ASAP if she goes there. A horse can not learn when they are RB. To create rapport you need to match and mirror her and then pacing and leading. You can not converse with this horse until you no longer see RB (get them to think they're teaching you to be quiet). She needs to be worked in a safe and familiar environment b/c this kind of horse has LOTS of thresholds. You need to be focused, perceptive, athletic, unpredictable (to interrupt pattern), quick, proactive, responsive instantly to her actions.
Now, if she is just unconfident then she needs you to retreat, turn away, look away, back away, change what you're asking, go to another obstacle/task. The key with this horse is consistency. To build rapport you need to match and mirror, back off, take it slow, act like you're unconfident too. To converse with this horse you attract their curiosity by going behind them (Zone 5), doing the opposite of what they expect, never block Zone 1! and always know the horse can do no wrong. This horse also needs safe and familiar environments. You need to be predictable, consistent and calm.
Since we have the picture of a RB horse in our minds, lets break down what their bodies do when they are RB. First, the reason the horse goes RB is because he doesn't feel safe. Lets break it down into categories.
Speed: quick and fast...everything a RB horse does is quick! unless it's a RBI. Head: carried high.
Eyes: wide, staring, sleepy (RB catatonic).
Ears: back (quick), strained, taut, twitching.
Neck: tense, braced underneck
Body: rigid/tense, sweat in unusual places (top of HQs, high on shoulder, behind ears), ribs toward you.
Feet: move quickly, extreme=frozen to the spot, pawing fast.
Tail: clamped, swishing very fast, high, "j-shape"
Mouth: tight lips, dry/frothy, displaced-popping, bite when your back is turned
Their tendency is to escape and get away. They are very afraid of change. Change can be a change in environment, equipment, you walking on the other side, change of direction, change of rein, etc.