,

@coleman

To calculate Average Directional Index (ADX) in Lisp, you can use the following formula:

ADX = 100 * EMA((+DI - (-DI)) / (+DI + (-DI)), N)

where:

- EMA is the Exponential Moving Average function
- +DI is the Positive Directional Index
- -DI is the Negative Directional Index
- N is the period for calculating the ADX

Here is a sample Lisp code snippet to calculate the ADX for a given set of positive and negative directional indices:

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(defun calculate-emd (values n) (let ((alpha (/ 2 (+ n 1))) (ema (first values))) (dotimes (i (length values) ema) (setf ema (+ (* alpha (nth i values)) (* (- 1 alpha) ema))))) (defun calculate-adx (+DI -DI n) (let* ((diff (/ (- +DI -DI) (+ +DI -DI))) (adx (calculate-ema (list diff) n))) (* 100 adx))) (defun main () (let* ((+DI 20) (-DI 15) (n 14) (adx (calculate-adx +DI -DI n))) (format t "ADX: ~a" adx))) (main) |

You can customize this code snippet to suit your specific requirements and input data.

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