@Aditya
If you just want to take a trade, then all the math is not needed and you go for the itm options, as delta is higher.
That at least is posted and told in most Indian forums.
But this is just the pure gambling way and in most cases a way with market orders and no limit orders, as it is done mostly on the emotional side and on some TA.
There is a far better way to gamble and that is doing it through tape reading. I do not know many who gamble that way, but if you want to gamble, then that is one of the better ways to do so. And by the way: I do not say the best, but a better way.
I fully support Ashus view and comment about the subject. Professinal option matrixes give you the edge to test and to see at glance what the option greek numbers are. That does not take any time to analyze when you do it all the time. Could post more on that subject, but most of you do any way not use such matrixes, so will stop here on the matrix subject.
For positional trading, it is quit important to work with formulas, math and very defined prices. It is not so difficult to predict if vola will go up or down. And at the moment it comes to real trading, means placing orders in the market: You most of the time will not get the highest vola or the lowest vola price with your options as you most of the time not will get the absolute top or low with your future prices. That is a fact and nothing to think much about. (Bid and ask and some where in between you place your orders / common sense)
So finally:
If you want to jump in to an option trade just like that, that is yours and most others option traders choice, as most have no deeper knowledge and understanding how to do it in other ways. It is what most option traders do with the hope to nail the trade and make a quick gain. Nothing else with no plan behind it. Pure emotional greed and hope built on TA patterns.
May I ask you: How many have you seen trading like that and standing the fight for a long time? How many post here there trading diary and how many of them are successfully fighting the market with that behavior?
Take care / DanPickUp