Here's how to sell a stock:
Click on 'NG Stocks' on the app homepage then click on the particular stock you wish to sell under the 'My Stocks' section.
Tap the 'Sell' button to complete the sale.
Input the number of shares you want to sell.
Tap Review Order.
Tap Place Order and the order is submitted to the stock market.
The funds from the sale will settle in 1 business day and you can choose to either reinvest or withdraw the funds.