Exchanges will give you trade files and positions at the end of everyday. You are supposed to import that into a software, calculate all charges (STT, Stamp, etc), your obligations, and etc. You nee to license a backoffice platform for this.
If you are in states like Andhra Pradesh, Haryana, HP, the stamp duty is maximum of between Rs 30 to Rs 100 per contract note. So if you intend to algo trade, it is best to have address from here. You can see all stamp duty here.
If you want to do algo trades, you need to have the entire execution management system + APIs + frontend to code strategies etc. Bare minimum will cost you atleast Rs 12lks a year including infra costs.
It wouldn’t make sense at 50k/month of brokerage. We have uniform pricing which is quite less, but the traditional ones who charge more will definitely give you a bargain if you commit brokerage upfront.
In today’s world with brokers like us, I can’t think of any reason why you would want to be a brokerage. Unless you become a hedge fund and start managing tens of crores of rupees.