Hello @srd
First of all, welcome to Dhan Community!
If you already have a custom strategy built on TradingView, you can leverage Dhan TV Webhook, and take trades in Dhan. You can refer to the community post here : Execute your Basket Orders via webhooks on TradingView
Since you are looking to trade in Bank Nifty contracts, you will need to use Baskets along with Webhook. Soon, direct order placement for options will also be available on Dhan, so do look out for that.