One of the much requested features in MoneyWorks Gold 6 was the ability to see Effective Stock levels when entering sales orders (i.e. the Stock-on-hand minus whatever has already been allocated on other sales orders).
To display Effective Stock on a Sales Order instead of stock-on-hand, click the column heading for the SOH column in the sales order entry. The heading will change to “Avail”. This setting will stick until you click the heading again to change it back to SOH.