Very bullish behavior from SPY

Very bullish chart for SPY. As predicted SPY has held the 116.25-116.4 range well. SPY has put in a W base pattern and is set to reverse to the upside. But I haven't bought calls yet because it is Friday. Wait a minute aren't Fridays the best days to invest? During this bull market run from March 2009 if we've learned anything it's that new money is always deployed on Mondays. So why am I hesitant to buy calls here? Because next Wednesday is Quarterly Options Expiration. So I'm anticipating some manipulation on Monday. But I still have made opened some long postions. You don't want to miss the SPY run up to 121.