Meaures the percentage of the underlying symbol upwards price change to its total price change during a specified number of periods.
Formula:
IMI = 100*U/(U+D), where
U = MVA(Up),
D = MVA(Down),
Up[i] = Close[i]-Open[i], if Close[i]>Open[i], else Up[i] = 0,
Down[i] = Open[i]-Close[i], if Close[i]<Open[i], else Down[i]=0.
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