Yes, you can set GTT Orders for your existing Positions or Holdings.

For existing Holdings:

Step 1: Log into your Upstox account.

Step 2: Navigate to the Portfolio and click on the Holdings section.

Step 3: Select a Stock that you want to sell and click ‘Sell’

Step 4: Select the Exchange in which you want to sell your shares

Step 5: Click on GTT and fill in the details on the order entry page, you can now personalise your GTT Orders by choosing either a Stop-Loss, a Target, or both,and click ‘Review Sell Order’.

Step 6: 

If you haven’t submitted POA or enabled DDPI, you will need to go through the below EDIS authorisation process before placing the order.
If you have a TPIN, click on the ‘Continue to CDSL’ button. If you don’t have a TPIN, click on ‘Generate New PIN’. A new PIN will then be sent to your registered mobile number and email ID. After receiving the new PIN, continue with the EDIS authorisation process.

For Existing Positions:

Step 1: Log into your Upstox account

Step 2: Navigate to the ‘Portfolio’ tab and click on the ‘Positions’ section

Step 3: Select any stock you want to sell and click ‘Exit with GTT’ or click on ‘Square off’ and Select ‘GTT’.

Step 4: Fill in the details on the order entry page, you can now personalise your GTT Orders by choosing either a Stop-Loss, a Target, or both,and click ‘Review Sell Order’

Note: If you manually exit Positions or sell your Holdings, it is important to cancel any ‘Scheduled’ GTT (Good Till Triggered) orders associated with that particular Position or Holding. Failure to do so could potentially result in the creation of counter positions if the GTT Orders are triggered and executed in the future.