How to calculate average in intraday trading of NSE/NIFTY equity shares?

Question

I am beginner in intraday trading of NSE equity shares in Zerodha. Sometimes I have failed to calculate the average when I trade the same shares multiple times during the same day. For example:

During morning hours:

If I bought 1,000 number of HDFC shares at 500/- and it rose to 505/- in 5 minutes and I sold, my profit would be (1000*5=5000).

During afternoon hours:

If again I bought 2,000 HDFC shares at 490/- and it rose to 494/- in 10 minutes and I sold, my profit should be (2000*4=8000).

So the total profit for the day is 5K+ 8K= 13K but my calculation is wrong. I do not see 13K. I see something less than that. What is the correct calculation?

If possible explain for below scenarios as well

Scenario-1

1. Morning: Sale-buy
2. Afternoon: Buy-sale

Scenario-2

1. Morning:Buy-sale
2. Afternoon: sale-buy

Scenario-3

1. Morning: Sale-Buy(short)
2. Afternoon: sale-buy(short)

Answer 1

For example if i bought 1000 number of HDFC shares at 500/- and it gave a spike of 515/- in a 5 minutes, i sold. so my profit would be (1000*5=5000).

1,000 x 15 = 15,000 not 5,000

If again i brought same 2000 number of HDFC shares at 490/- and its gave spike of 494/- in 10 minutes , i sold. i expected my profit should be (2000*4=8000).

2,000 x 4 = 8,000

The total is 23,000

Deduct commissions and fees

Answer 2

It is basically 5000+8000 as you have already mentioned. But I think you might have forgot to consider the brokerage charges, other charges like STT etc., on every trade which normally depends on your broker, the plan you choose, amount of trade you have done etc., I suggest get in contact with customer care of Zerodha to know more about it.