You are doing a wonderful job by helping your client building their strategy.
Can you please help me building this strategy
Every span of 15 minutes the application takes the price of Nifty and Banknifty high and lows and keep it as a reference price. After then when the 4 high low of nifty and banknifty i.e. 60 minutes remains inside of the high and lows of the reference price; it gives an alert on mobile or on email.
Price alerts to the mobile is sms is not available for now, you can login to trade.zerodha.com and can set the price alerts to the email by configuring the email.
@AlgoGeek Thank you very much for the answer but how to build that strategy?