Task: I want to create an exchange rate alert of less than 1.2290 USD as compared to 1 GBP so I can get a notification as soon as the price hits the set limit in the Xe app. 
Steps:
Click on the rate alerts tab at the bottom right of the screen
Create on create alerts
Click on the ZAR dropdown
Click on USD currency
Swipe the desired rate below to the current rate
Swipe the desired rate below to the current rate
Click on the create alert button
Click on the create alert button