Most active topics last 24 hours

[riverplate.com]

Hi!

i'm coding a cron that every hour gets the last 5 topics of the forum.

this it's the part where i've get the data

PHP Code:

$threadlist = $vbulletin->db->query_read("SELECT thread.threadid AS threadid, thread.title AS title 
                                          FROM " . TABLE_PREFIX . "thread AS thread
                                          WHERE thread.forumid = 9
                                          AND thread.open != 10
                                          AND thread.visible = 1
                                          ORDER BY thread.dateline DESC
                                          LIMIT 5"); 


but i'd like to show the most active (where users posted) topics within 24 hours.

is it possible? any ideas

thanks in advance