You can see the minimum trade amount by opening the Trading Conditions for the instrument.
From the Trade Ticket:
Select the relevant instrument and click on the (i) icon.
Switch to Instrument and check the Min. trade amount value.
You can also see Min. trade size, Lot size, Exchange, Collateral value, order types on Trading Conditions. For many instruments, lot size is 100 shares. However, please check the instrument Trading Conditions on Saxo platform to get the most accurate information.