As per my Understanding ,Exchange Transaction Charge are on Trading Member Level…I have not see any guideline which mentions exchange charges retail customer. Its not a Government Charge like STT, Stamp Duty.which are specifically charged to clients. Also, technically, NSE is also a Private Company…they fight tooth n nail…to not come under RTI…
Thereafter , brokers are free to pass on this charges to clients. …so…they may be charging as per lowest slab .