Sharekhan TradeTiger Questions from a newbie

#1
Hi,

I would like to ask certain questions regarding dealing with sharekhan on intraday trading.

1] If I want to short-sell, in the sell menu I have to “Tick – Against Margin” and buy – Have I understood it right?

2] Brokerage, what will be the lowest for intra-day trading if I pay upfront brokerage? I hate paying brokerage two-ways.

Any other companies, having lower brokerages?