In order to Top-Up your NAGA One using the funds from your trading account. You must click on the Invest icon on the bottom of the main screen
When you are in the main screen of the Invest you will need to drag the bottom part where the amounts are showed. Then you can select the trading account and click on the '+' sign.
Select the Payment Method you wish:
- NAGA One Balance
- Credit Card
- Other methods that might differ between countries
Enter the amount and click "Add money".