NLV can be calculated as, 

NLV = TAV +/- Notional Profit (loss) on your Option positions +/- Notional Profit (loss) on your Future positions 

Where, Future Notional Profit (loss) = Net quantity * (Last Traded Price - Average Transaction Price or the last settlement price as the case may be)

Option Notional Profit (loss) = Net quantity * (Current Option Premium price - Average Transaction Price or the last settlement price as the case may be)