I see stocks in my holdings that I have not traded.

Corporate Actions like Merger,  De-Merger result into addition of new stocks in your portfolio. Such stocks will be over and above your traded stocks.

 You can check this through following process:-

 Step 1: On the Portfolio Summary page click on 'View Details' on the card of that particular stock.

 Step 2: This opens window which shows all the transactions in that stock under 'All Transaction' tab

 Step 3: If you find 'MERGERIN' or 'DEMERGERIN' mentioned under Buy/Sell, it confirms the reason that we have mentioned above