Post-Only orders are a limit order type on Delta which is only accepted if it does not immediately match with an existing order in the book. In line with this, a Post-Only order is one which is “posted” in the order book and which is not executed upon submission. Post-Only orders add liquidity to the order book (as opposed to taking liquidity), ensuring that traders pay the maker fee upon submission, as opposed to the taker fee. To enable Post-Only mode, simply check the "Post Only" button in the order form prior to submitting your order. For information on further order types, visitDelta Order Types. For video demonstrations, visit theDelta Youtube channel.