Can I set up the MoonBot terminal so that if my loss is greater than a set value, that MoonBot not only stops but also sells all the coins I bought?

Yes, to do this, on the Settings – Autostart tab, check the “Stop If loss greater then” option (right-hand setting), set the loss limit below and specify the number of hours. Also check the option “Also Panic Sell all active orders” below. This protection will help you close all positions if the loss limit is exceeded.