Dear, its not impossible to make 20% per month,i.e,Rs 1000 daily(on average) using 1L when u trade with futures, but it is possible for only few exceptionally experienced trader.
U need at least 5-7 years of experience in real life trading to do above. Bcoz, there will be some loos making day, some break even day (no loss, no gain) and obviously there are some no trade day (high risk of loss when no clear trend in intraday). So net 20% monthly is very very tough. But it definitely not impossible with 1 lakh but almost impossible with higher capital(Say 100 Crore) bcoz with more capital more risk & emotion is attached. Human emotion handling power is limited, it only increases slowly. Thats why real life trading is much more difficult than paper trading. Always, remember , in paper trading u never lose real money so there is no fight with your emotion/ego/fear etc. Whenever u try to do real trade with real money that would be much more difficult with same successful paper trading system.
So be careful, try to trade with little money @starting. Increase ur trading limit slowly whenever get used to.
It seems, u r a beginner so, may be I have said a lot. Remember, whenever u place a order u are entering in a battlefield. So your 1st target must be how to escape unhurt, i.e No Loss & Brokerage Recovery. Enter when that (No loss) target is sure, profit automatically come. Never think of % Return. Profit will increase with experience.