Help OnLine | Chart – Z-Score
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Chart – Z-Score

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Graph that represents the Spread expressed in Z-Score and that is how many standard deviations is moving and has moved.

Inside you can see two red and green lines that represent the value of 2 Z-Score and -2 Z-Score.

I remember that at 2 Z-Score the pair is sold and at zero it closes while at -2 ZScore the pair is bought and zero is closed.