The lot size of normal Nifty Future (NF) is 50, while in Mini Nifty Future (MiNifty), one lot size is 20.
So, when u initiate a position, and looking at the stop loss level, if your risk/money management system does not allow you to take more than 1 lot (50) of NF, then I would suggest to take position with 2 or 3 lots of MiNifty...
2 lots=40
3 lots=60
+/- 10 than NF.... not a great difference.
So, basically, you'll have the same risk profile with 3 lots MiNifty as compared to 1 lot of NF.
Secondly, in intraday trading, regular profit-booking is advisable... one is not here to acknowledge a system, or make posts here in such forums - but to make money. And for full time traders, intraday trading is like bread-n-butter. If u enter long at 3200 with stop at 3180, and if it goes till 3300 and comes back and hits your trailing stop of 3240, then how would u feel.... this is just an illustration, and being a regular intraday trader, this situation happens (as it is, one never knows how the day will turn up - everyday is not like today; a trend reversal day).
So, I always feel comfortable when I book out part-profits at known key levels, and I would also like to go with my / system's trailing SAR. For this reason, one should have more than 1 lot - for newcomers/paper traders/ new systems trials, etc, MINIfty comes very handy.
Atleast, even if just want to test waters, you may even start with 1 lot of Minifty (=20)
But, remember, at end of the day, it's not how much nifty points u collected/travelled, it's how much you made MONEY out of it... this is not a hobby/easy route.... if u want to make it your profession, you'll have to treat it professionally.... At EOD, one can easily say: oh, wish i would have done this or that.... NOPE, no room for this; day over - remember your mistakes/omissions, but see to it, that it's not repeated. EVERYDAY IS NOT THE SAME DAY. In jobs, one's work is fixed & clear - not here.
Thankfully, Saint Sir's system is such that one need not anticipate things, and worry about hitting SAR - it might be the start of another trade, which may turn out to be more profitable than the earlier trade.
Try out for few weeks, before you decide about your career. It's not just hard work & patience, but also discipline & trying to keep "I" out of the trade... One shouldn't try to prove the market is wrong, or "I" am right.... go with what you r seeing on the trading terminal & the foremost -THE PRICE CHART.