Can I set a fixed order size in the MoonBot terminal strategies without affecting the order size in the main settings?

: Strategy settings

Yes, this can be done using the OrderSize: Fixed size of the Buy order in the base currency. If 0, then the value from the general settings is used. In other words, if we set OrderSize=100 (on the USDT pair), this will mean that this strategy will always place an initial order of 100 USDT.