Other contributors have said "You are havin trouble gettin your rank up in halo 3 does anybody have any good suggstions you will win 5 games in a row and not rank up then loose only 1 n rank down?" is the same question as "You are having trouble gettin your rank up in halo 3 does anybody have any good suggstions you will win 5 games in a row and not rank up then loose only 1 n rank down?". If you believe that these are not asking the same thing and should be answered differently, click here.
keep trying to rank up and wining games,
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The above answer is not necessarily correct, try the link below which takes you to bungies website and may provide you with a more in depth guide to how the rankings system works.
XP points are gained for each win but skill ranking is not progressed in the same way hence you could win 5 in a row and still not rank up.
http://www.bungie.net/Forums/posts.aspx?postID=14414600
well i havnt played in couple of months but when i did i played non stop i mean halo 3 24/7 lol and i found out that if you lose 2 games or how ever many you have to win that many more i get ur highest skill up like lose 2 win 3 there ya go but its got to be in a row