Normally on a 200/= stock one can expect a Rs 1.00 profit.As in this case the earlier trade was Loss,which could be recouped with slight profit by the 2nd Trade & am exposed to few other counters,hence got out .
As to your question;say one has Rs 10 k he can get an exposure of 1 Lack (min)in Intraday,now if the Stop is nearby the Qty is more.