Hi, I have been implementing and testing various day trading strategies on the IB TWS Java API. My recent strategies involve entry / exit signals generated from pivots and daily ranges. I have been monitoring the SPX but trading either SPX options or the SSO ETF. I am thinking about shifting to ES contracts because of the leverage available. I was wondering if there are any "gotchas" or things to look out for before I start trading ES contracts. In particular, do I need to change all my signals to be triggered directly by the ES price, or can I still use my signals from the SPX to trigger buy and sells? any advice will be appreciated.