Motion detector placement questions

Hi all, I am going to setup a new ring alarm and was wondering about the placement of motion sensors.... the question I have is this. In my ideal location, there is a "decorative chain" that my wife has hanging from the ceiling about 16 inches out from the corner I was planning on placing the sensor. My wife put it there "for a reason" so moving it will be an issue for her, and hence, me. Will a thin - maybe 1/4 inch wide decorative chain that does not ever move or twist throw off the motion sensor? Or should I just start looking for an alternative location for the sensor? thanks! Chris