tie bar will weigh it down and make it move around even more. the real purpose of the tie bar is to help keep your tie out of your food or from blowing up in the air.
if your jacket stance is slightly higher, you can wear the tie bar higher as well. it should always be seen when wearing a jacket.
don’t wear you tie bar close to your neck or tie knot, or down near your trousers and tip of the tie. neither of these ways will look appealing or help keep your tie in place.
make sure it is still attached to your shirt to avoid it just flopping around. 