New member here: Back testing has been mentioned as an important tool in one's option education. Does anyone have any articles, books, websites, etc. in learning how to back test or the best methodology(ies)to apply to a given strategy? Where does one learn how to back test? What am I looking for/at when back testing? If the underlying goes in a particular direction how that move effects the Greeks, price, & IV? I have TOS, do I need to buy OV or ONE? Do they have classes on how to backtest with their product? Thanks in advance for your suggestions.