WordPress global variables?

Meta data is save in postmeta table and to get them you can use get_post_meta($post_id,'meta_key_name',true);

so in your shortcode function globilaize $post object and get you value like that

if($something == "value") {   
     global $post; 
     $one = get_post_meta($post->ID,'value_name'true);
     $two = get_post_meta($post->ID,'value2_name'true);
}