If someone wants to see the GLD options chain of the Sept 22 "at the money" options (In the money calls on the left and out of the money puts on the right) As you can see the large stack of in the many calls on the left is what they are trying to take out before the Quadruple witching.
Here is the link: Take out the space.

www.nas daq.com/aspxcontent/options2.aspx?symbol=gld&selected=gld&qm_page=94496&qm_symbol​=GLD