Navigate to the preferred order from the available list in the Orders screen
Press your BlackBerry track wheel and choose Select from the side main menu

You will be redirected to the Order View screen of the specific order you have chosen to work with
Press the track wheel and choose the Limit Order function

You will be rerouted to the Limit Order screen where it is required to provide pricing details.
There are several displayed fields:
Trade: Position ID number and Instrument
Base: Account Base Currency
Lot: Number of lots / mini lots
Your Rate: Your new price has to be lower than the current price
Required Rate Field: Trader enters his/her Rate in this field
Using the track wheel scroll to the bottom field and enter the numbers you think fit best ( In this case your Limit price must be lower than 120.47)
Once required field is filled in press the track wheel and choose OK
LIMIT ORDER SCREEN

Once confirmed you will be redirected to the Order View screen.
Scroll down to the Limit field where you should be able to see the Limit Order you have just placed for this existing order