ranking system

whats up with this ranking system. i win 4 games in a row but my ranking bar barely moved and than i lose a match and i almost lose half of my ranking bar. Please explain

For questions about the ranking system, please use this thread: https://www.halowaypoint.com/en-us/forums/58b8518e005f432381ab99fbcaf931e0/topics/matchmaking-feedback-update-%e2%80%93-august-31/bd0d524a-aeb1-432c-aa33-68e854a5125e/posts.