The Post-Only order will only be executed as a maker order. If it can be executed immediately as a taker order, it will be automatically cancelled.
1. Locate the order placement zone on the right side of the trading page.
2. Post only function is only shown when placing limit or conditional limit orders. Enable it by checking the box as shown below.
3. Proceed to successfully place the order. The system will auto cancel the order if it checks and determines that the order will be executed immediately.