Can I trade currency derivatives on BSE?

I am exploring options to reduce my cost of trading and transaction charges on NSE is high. I don’t see any brokers offering currency trading on BSE. Why is that so when the transaction charges are much lower?

I don't know if that's a good idea. The liquidity on BSE is a lot lower than that on NSE.

Also, BSE has just revised it upwards and will match up with NSE soon. Here is a link to the newsarticle. So I think it's best to trade CDS on NSE.