To add drawings indicators, follow these steps:

Step 1: Click on the Fx button to add an indicator to the chart.

Step 2: Search for your desired indicator and tap the ‘+’ icon.

Step 3: Customise the values and style for this indicator by adjusting the settings to match your preferences.

Step 4: The indicator will be displayed on your chart.

Step 5: To add drawings, tap on the Pencil icon or the drawing tool.

Step 6: Choose the drawing tool you want to use.

Step 7: Place your drawing on the chart.

To add/view OI (Open Interest) follow the below steps:

Step 1: Click the Fx button to add an indicator.

Step 2: Switch to the "Special" tab and tap the '+' icon to add OI (Open Interest).

Step 3: After saving, you can view your OI chart.