How I made 5% gain intraday in falling market

Lets say you started with 1 Lakh capital

Your broker will give you 10 Lakh exposure.

So you devided this 10 lakh equally in all 40 shares. So every share you get 25000.

Net gain is 21.66%..That is 25000*21.66%

Now you got a total profit of Rs.5415 from a capital of Rs. 1 Lakh