Just follow these instructions.
Adding indicators in the app
1. Tap on any market to view its chart
2. Tap the 'Expand' button at the bottom right of the chart
3. Tap the 'Indicators' button at the top center of the chart
4. Choose the indicators you'd like and click on them to add to the chart
Adding indicators in the web platform
1. Locate your market in 'Charts'
2. Click the 'Indicators' drop-down above the chart
3. Choose the indicators you'd like and click on them to add to the chart