You have to enter “price” : 0 in the request body of the Place Order API. For Example, below image shows request body of Buy Order of Quantity 1 of SBIN-NSE at Market Price
In the json data of Place Order API, Put the value of "pt" parameter to MKT.
How do I upload/place and modify basket orders?
How do I place a sell order for my open positions?
How do I manage my watchlists?
I was given excel rights yet am unable to export my watchlist