OK, I think I have Kucoin trading figured out now.
Kucoin apparently has no one-step 'coin conversion' function similar to Coinbase, where an order can be placed to convert one coin into another coin.
To complete a similar conversion in Kucoin seems to require two steps. The first step is to buy USDT with the coin I hold (using USDT as an intermediatory coin), and in the second step, buy the new coin I want with USDT.
If I want to just stay on cash, I just hold USDT.
Is this what you are doing?
Regards,