Dan,
Rs 3,00,000 trading account is not a big account. In fact for trading 10 contracts one must have Rs 8,00,000 to Rs 10,00,000 in trading account though broker may require 300,000 to 4,00,000 as margin money,if we trade with proper MM....below that trading 10 contracts in daytrades is high leveraging.Thumb rule is 1 Nifty Futures ( 50 Nifty ) or 1 Bank Nifty Futures ( 25 Bank Nifty ) per Rs 1,00,000 capital.
ST