You can set default values for specific symbols entered into the Order Entry window. For example, you can set the default number of shares to 500 when you enter MSFT into the Order Entry window, or set the default Route to ARCA when you type CSCO into the Order Entry window.
Perform the following to set default order entry options for a specific symbol:
You can create a list of symbols
with default settings from the Settings
window - Order Entry tab. To access
this window, select Tools>Settings
from the main window and then click the Order
Entry tab.

Select the appropriate tab, Equity, Option, or Future, for the symbol you want to add
In the Symbol field, type the symbol
Click 
On the right, click the check box to enable the default options you would like to set for the selected symbol. For example, if you want to set the default quantity for the selected symbol, click the Quantity check box
In the corresponding fields, type a new default value for the selected symbol.