How to get max and min value from WP_Query?

Question

WordPress

Can you tell me how to get MAX and MIN values ​​from an array of records? I have posts belonging to one category, there is a catalog page where all posts of this category are displayed with pagination. The uploaded records, I want to sort by the values ​​of arbitrary fields, using ACF. For example, by price and diagonal.

Example:

<?php $query = new WP_Query( $args );
   while (have_posts()) : the_post(); ?> 

    <div class="tovar">
      <a href="<?php the_permalink() ?>"><h2><?php the_title(); ?></h2></a>
      <p>Цена: <strong><?php the_field('price'); ?></strong></p>
      <p>Диагональ: <strong><?php the_field('char'); ?></strong></p>
    </div>
 
  
    <?php    endwhile;   ?>
    <?php   wp_reset_postdata(); ?>

<?php echo paginate_links( $args ) ?>