In a large pot of boiling lightly salted water, cook macaroni according to package instructions. Drain and rinse under cold water to cool. Set aside.
In a small bowl, combine mayonnaise, milk, vinegar, mustard, sugar, salt and pepper, and whisk until smooth.
Place cooled macaroni in a large mixing bowl, pour dressing and toss. Stir in chicken, carrots, chives, pickles, bell pepper, celery and olives (you can always add more of any ingredient if you feel it's needed). Serve immediately or refrigerate until serving. Enjoy!