Firstly, NSE has a data vending license for tick by tick data, it is just extremely expensive and a very tiny market, so no business is vending live tick by tick data. Otherwise you could have just subscribed to this data, like other forms of data. Check (real time tariff) on this
https://www.nseindia.com/supra_global/content/dotex/data_products.htm
Second issue is, it is almost impossible to consume/stream this data via internet. It is tens of GB’s worth of data and the cost/infra for streaming this is non-viable. Even if it were to be streamed, it would be delayed.
The ideal solution for this is
Ask the brokerage (we can help too) to take a rack on exchange colo. Within that rack ask for a server for yourself and ask the broker to subscribe to exchange TBT. You would then need a point to point leased line from exchange colo to another data center in Mumbai from where you would access your server. TBT data is today quite cheap, but the rack on the exchange along with server, leased line and another data center, might cost you a couple of lakhs a month. If the broker doesn’t have multiple clients for that particular rack, you would have to bear the entire cost, which would mean it can cost you upwards of 4lks a month.
The alternative way is to take an alpha membership on the exchange yourself by putting up a 50lk deposit, and apply for the rack etc. But you would still need to go and get yourself a technology vendor, which can cost you atleast another couple of lakhs per month along with added compliance cost(over a lakh a month atleast, even if no outside clients) of being a broker/member.