Why is an additional software and date feed needed ?

#1
What is the advantage of using an additional software and data feed other than the software provided by broker.

For eg. Isn't PowerIndiabulls software enough? It also displays realtime charts and technical indicators and live realtime quotes. So why is the need for an additional software and date feed costing thousands of rupees per month?

I guess I am missing something as I am newbie to stock exchange. Can please anyone shed some light on this?

Thanks.
 

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