i think i get it know.
without explanation in the gui it is to complicated.
we need now a section with a documentation or maybe links to the wiki. new users need to know how to do something.
if i understand it correct the explanation could be done like this
"the shorts are only executed to the feedprice (average or median??). you will see on the ASK side a shortwall and the available shorts who will executed at the feedprice, if someone want to buy at this price. if you don't place a price for your short, the short could be executed at the feedprice."