What is the secret of ADX indicator?

Can you please shed some light on the enigmatic ADX indicator? I'm particularly curious about its secret - what makes it so valuable and sought-after in the realm of technical analysis? Is it the unique way it measures trend strength, or does it have some other mysterious quality that sets it apart? As a seasoned practitioner in the field of cryptocurrency and finance, I'm eager to understand the intricacies of this indicator and how it can help me make more informed decisions in my trading endeavors.