For zerodha pi software you have to being an active client with zerodha is required in order to have Pi enabled on your trading account. Customers who have executed at least 30 trades in the previous six months, at least 20 trades in the previous three months, or at least 10 trades in the previous month are considered active clients. Active clients must also have at least Rs 10,000 in their trading account. so they can use or enable Zerodha PI.