For using this feature you be an active client of zerodha and To place an order, dial 080 4718 1888, select the appropriate IVR option, then enter the Support code and follow the on-screen directions. The charges for every new order, modification or cancellation request is ₹50 + 18% GST. Call and trade hours for stocks are from 9:00 AM to 3:30 PM, while they are from 9:00 AM to 11.30 PM (March through November) and until 11.55 PM for commodities (Nov to March).