cheapest brokerage

Was referred about zerodha from a friend yesterday. anyone who has used their services??? They are saying 20rs/trade , we can buy and sell as much, for intraday delivery and fno... If anyone already opened, do give me a view... thanks.....

Hi me new to day trading. i searched this forum for demo for the trading platforms. i found some demos but all those demos are screen shots only. can i get real demo of online trading platforms of these brokers . i am not sure how many have their trading platforms. please give link to download...