What is mark to market profit/loss in stock futures ? How is it calculated by the stock exchange?

I trade in futures segment of stock.When I buy a lot of a stock %26amp; sell it the contract note for each buy %26amp; sell shows mark to market loss or profit which is totally different as per the difference in amount of buy %26amp; sell ? What is it %26amp; how is it calculated? pl.describe in detail.|||for the pending net trades of buy/sell, after day end ,closing rates are fixed and calculated the profit and loss amount .


this is called mark to market profit/loss and credited/debited to account holder.|||E.g., your margin is 50000, you have bought at 1 lot of 1000 shares of x stock at 100 and today's closing price is 105- your account shows a profit of 5000.(55000).





Suppose tomorrow, the closing price is 99, your account would be -6000 from 55000- =49000.


But actually your loss is -1000 only. Hope this is clear.





(Meanwhile, avoid futures trading.)


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