If you want to rank up on this forum, you have to make quality post, if any member of the forum think your post is useful, then they might merit it. If you check this thread, you will understand the amount of merits required and activities required to attain a particular rank (https://bitcointalk.org/index.php?topic=1689727.0). If you keep on posting, your post count and your activities will keep on increasing but your merit will never increase automatically if anyone did not merit your post.