I am in no way associated with IB although I have paid them a boat load of commission without getting too much customer service. Here is probably what you are looking for and not specifically getting help from fellow ET members:Quote from jonlebon:
For example if you have a long position of let say 30 units, any extra order with the equity will default to 30 units which makes a lot of sense.
Whereas with IB, it would default to100
Now if I can only get IB to set up a less onerous but more effective security system so that I don't have to log in every 12 hours or so.... how about a USB key fob with an encrypted resident program running on designated PCs and IP addresses?