#backpack Fun Facts Self-trading cannot be done by sub-accounts. Only two different accounts can participate. How to do self-trading: Find a token with relatively low trading volume. Then place a limit order on one account and a market order on the other. (For NFT Level 1 and above, there are no fees for limit orders. The other account only incurs the fees for market orders.) Those who use Ski's order-dominating service are in luck!