You can hover on your desired underlying level to place an order, say NIFTY 23,700 CE. 

You can then click the ‘Buy’ or ‘Sell’ button to add it to the Basket Order. If you want to add more contracts for your strategy, you can hover over that level and add a contract. In case you want to remove the contract from the basket, you can press on the delete button.

After selecting all the contracts for your strategy, click ‘Analyse’ to review max profit/loss and other key metrics in Strategy Builder. You can also place trades directly using the “Trade All” button.

In case you are in a hurry to grab a diminishing opportunity, you can use “Quick Trade” feature.

This will select a Buy Call and take you to the order placement page. You can click on “Place All Orders” to execute the trade.