Hi @Shivakumar
Welcome to Dhan community. TradingView offers a library (that is hosted one) to use and some of the premium features on TradingView are not extended in same, hence the limitation that you mentioned.
We suggest using free webhooks that Dhan provides for execution directly via TradingView, you can read about this here: Introducing Webhook Alerts : Direct Order Placements on TradingView from Dhan