As indicated by our Fee Structure, for both spot (EXCHANGE) and margin (MARGIN) trading modes, if you choose to pay your trading fees using QASH, there will be a 50% discount applicable on all pairs.
Trading fee preferences can be changed as below.
With Liquid Pro open, tap on the 三 icon on the left.
Tap on Settings
On Pay fees with QASH, turn on the switch to pay your fees in QASH using your QASH balance.