The bang rule is mostly used for very pretty girls and average girls,including the techniques involved, because these girls are the ones that get all the attention the most, when you try to strike they give you some kinda attitude making it look hard to get,no girl is hard to get, speak the right language and they will respond to you.
One thing you have to analyse first and know is that,men are governed by logic, and woman are ruled by emotions. Take this to your advantage and see it work like magic, she is intelligent yes, and she probably likes you but you havnt developed good habit to make her discover she likes and in love with you