To set up a watchlist and include stocks to it on the Trendlyne app, follow these steps:
To create a new watchlist, tap the ‘+’ icon.
Give your watchlist a name, and it will be successfully created.
To add stocks to your watchlist, select the watchlist you've created from your list.
Now, tap the ‘+Stock’ option available.
Search for the stock you want to add and select it. The chosen stock will be added to your watchlist, as shown below.