How It Works -ADX with DI+ and DI- This indicator measures trend strength and trend direction using three lines plotted in a separate pane below the price chart. The three lines: +DI (Positive Directional Indicator) — measures the strength of upward movement. (green line) -DI (Negative Directional Indicator) — measures the strength of downward movement. (red line) ADX (Average Directional Index) — measures the overall strength of the trend, regardless of direction. (gray line) Calculation (de