Can the seller side mark his order with AON (ie. All Or None) as well, or can only the buyer side use it? Another question: I wonder if there is also such a setting for "exact price"? Ie. when buying you specify a limit price, but the purchase shall happen at exactly that price, not at a possibly lower price, though it would of course be an advantage, but in this special case it's a disadvantage and not wanted; the trade has to happen exactly at the specified Bid price. Can this be enforced?