Yes, open orders can be modified.

Step 1: Go to the Orders section at the bottom and swipe left on the pending order.

Step 2: Tap on the modify icon to modify the order.

Step 3: You can drag the limit, stoploss and target line to set them at desired price.

Step 4: Click on the keyboard icon to enter a specific price.

Step 5: Adjust the quantity or lot size by using the + and - icons.

Step 6: Swipe to modify and confirm the changes.