I wonder if it makes any sense to simulate options' prices and back test trading system that way. Assuming I will hold positions for a long time (90 days, hold position until expiration) and I plug current volatility as IV into BS to get option price that I sell or buy. Would this be at all realistic? I read 'option volatility and pricing' by Natenberg and on pages 285 - 289 he shows that IV more or less follows historical volatility of the same period. I know there will be small differences, hopefully not too big?