If you wish to schedule automatic payments towards your trading account, then the recurring deposits option will help you do that.
You can set one straight away from the Deposit Window, simply by enabling the Recurring option. You can also adjust the schedule according to your preferences.
If you are using the web-based version, please click on the top right corner and you will see the "Manage funds" button in the drop-down menu.
The Manage Funds menu will appear in the centre of your screen and provide you with the option to Deposit, Withdraw, or Move Funds.
You can find information about the already set schedules in Manage funds -> Deposit schedule
If you want to cancel a previously-set Recurring Payment, you need to go to Deposit Schedule, select the payment that you wish to cancel and press Delete at the bottom of the screen.