To clarify: - Some data vendors provide a continuous contract such as eSignal, if my memory serves my correctly, the symbol for the ES is "ES #F" - NinjaTrader allows you to chart this symbol OR - We will merge expired contracts with the current front month transparently for the user - There are settings that determine how the data is merged, by default we back adjust the expired contracts by calculating the offset between contracts Since NinjaTrader is always a free application for analysis, anyone with an eSignal account can connect and check out how the continuous contracts work.