The position mode is one-way mode by default. You need to enable “Hedge Mode” to hold positions in both long and short directions at the same time.
Please note that you need to set the position mode for the USDⓈ-M Futures and COIN-M Futures individually.
Step 1: Click top right corner of “Place Order” interface and select “Position mode”.
Step 2: Select “Hedge Mode” in the pop-up window. Note: Please be noted that you could only adjust the position mode when there is no position or open orders.