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You can complete the last operations to find the value of ADX indicator in easier way

  • Calculate Directional Movement Index (DX). It equals the absolute value of +DI14 minus -DI14 divided by the sum of +DI14 and – DI14. It is also expressed in % terms.

  • Calculate Average directional index (ADX). It is the 14 period moving average of DX.

ADX = MA [((+DI) – (-DI)) / ((+DI) + (-DI))] x 100;

Thank you very much. A bit complicated. :)