nifty calculation
sold at 4751, covered at 4684, points gained 67, -2 as brokerage, net gain of 65 points
sold at 4689, covered at 4678, points gained 11, -2 as brokerage, net gain of 9 points
bought at 4682, covered at 4727, points gained 45, -2 as brokerage, net gain of 43 points
5000 call long : 10 lots
bot at 0 sold at 34
34 x 10 x 50 = 17000
4800 call bot at 82
4900 call sold at 56
spread cost = 82-56 = 26
present price =
profit = 40-26 = 14
14 x 10 x 50 = 7000