Tis the Season for the most powerful seasonality trade of the year! With the stock market up big in 2013 and most participants are speculating on a pullback in the next week or two, I have to say I am on the other side of that bet. Being a technical trader I focus on patterns, statistics and probabilities to power my ETF trading strategies. So with 37 years of stats the seasonality chart of the S&P 500 index paints a clear picture of what is likely to happen in December.