Margin for fno

I am preparing my personal account books in excel primarily the Ledger and trial balance.

I buy shares as investment and some sales are done on achievement of profit or on stop loss trigger. I also dabble in FNO futures.

Q1. The debit of Margin amount from my account, how to traeat this.

Should I make a margin account in addition to Futures trading account, or since this is a kind of deposit can I credit the bank account and debit the cash account. on closure of position the same can be reversed. 

Regards

K S Soin