Saying that you have an edge because of positive expectancy is at best a truism. The real question is WHY you think your approach gives you a positive expectancy.
The general assumption in trading is that buying and selling at random has an expectancy of zero, minus transaction costs. You need to consider what it is that you do in order to raise your expectancy enough to beat transaction costs - basically you need to be identifying a mispricing (in price or volatility), and selling above value, or buying below.
The general assumption in trading is that buying and selling at random has an expectancy of zero, minus transaction costs. You need to consider what it is that you do in order to raise your expectancy enough to beat transaction costs - basically you need to be identifying a mispricing (in price or volatility), and selling above value, or buying below.
