As you have joined with Procon, pls give us following details:-
What is that extra Clearing Charges of Rs 200 mentioned in brokerage calculator for Equity Futures? Is it stamp duty or hidden transaction charges in the name of 'Clearing Charges'? There is also Clearing Charges of Rs 100 extra for Commodity.
If it is not stamp duty then actual Transaction charges is too much, as 190+200=390 on higher side like Zerodha. But their is no stamp duty benefit like Zerodha as Procon is Channi based and we all know that Stamp Duty of TN is very high like Rs 600/Cr with no max cap.
Their Rs 10 OR unlimited brokerage @Rs 999 is good but we must know first what is these extra 'Clearing Charges' (Stamp Duty OR Hidden Transaction Charges)?
PS:
If you don't know about equity, then just answer about Rs 100 extra 'Clearing Charges' for commodity. Is it Stamp Duty or Transaction Charges is 250+100 =350 and there is stamp duty also?