Directional Movement Index (DMI)

DMI · +DI · −DI

System of +DI and −DI lines measuring upward and downward price movement; the gap between them, normalised as ADX, quantifies trend strength.

+DM = max(High − Prev High, 0) (if > |Low − Prev Low|); −DM = max(Prev Low − Low, 0) (if > +DM); +DI = 100 × Smoothed(+DM) / ATR; −DI = 100 × Smoothed(−DM) / ATR