Why I can’t able to unpledge my shares in Flattrade?

If you’re unable to unpledge your shares/securities, it may be due to one of the following reasons:

• If the collateral margin from your pledged shares/securities is already utilized for trading on the same day, unpledging will not be allowed.
  You must close the open positions and then unpledge the shares on the next trading day.

• You can only unpledge the unutilized collateral quantity.
  This will be shown as “Available Qty” on the unpledge screen, and only this quantity can be unpledged.