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Is it possible to see a bar before its fully closed in a backtest?

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  • Is it possible to see a bar before its fully closed in a backtest?

    If I have a strategy that depends on weekly bars, but I want to know what a bar looks like before it closes, what is the best way to do so? The reason for this is because when I'm running my strategy in real-time, Close[0] references the current, unfinished weekly bar (for example if today is Wednesday, it would show Close[0] as the Close of Wednesday). However, when I run this code in a backtest, Close[0] returns the Close from 5 days ago (last Friday). This is a bit annoying to have to use Close[1] in Real-time in order to get the same results as my backtest's Close[0]. In addition, if my strategy does require knowledge of unfinished candles, it seems like that is not possible in backtests unless I manually aggregate the 1-minute chart, for example, into a pseudo-weekly bar for Sunday-Wednesday.

    Are there some functions/tricks that I should be aware of for this?

  • NinjaTrader_AlanP
    replied
    Hello stokhastic,

    Thank you for writing in.

    Backtests are based off historical performance and historical bars, there would be no supported method for testing the performance including the current bar while testing with the strategy analyzer.
    You could use Market Playback to test how a strategy has preformed up to the current moment.

    https://ninjatrader.com/support/help.../?playback.htm

    Please let us know if you need further assistance.

    Leave a comment:


  • marcus2300
    replied
    I backtest manually. A good backtest would test at least every 1 minute, not just the close of the bar. That can make a huge difference in performance.
    Last edited by marcus2300; 11-25-2018, 03:39 AM.

    Leave a comment:


  • stokhastic
    replied
    Hi marcus. I'm still having issues in backtests. https://ninjatrader.com/support/help...a_strategy.htm says that backtests can only be run on the CLOSE of candles. However, if I have 5 minute data and Tick data as my two data series for my backtest, is there a way to calculate the current 5 minute bar from the tick data? This would help me mimic real-time market dynamics for backtests.

    Leave a comment:


  • marcus2300
    replied
    Use the replay function. It will replay the period tick by tick. You can jump also, if you wish, to certain moments to speed up things a bit.
    To use the replay function you should download that data day by day. To do that, click:
    Control center
    File
    Utilities
    Download replay data


    or change the settings. To do that, click:
    Control center
    Tools
    Options
    Data
    Select "Record for marketplay".

    If the settings are changed NT will save all the detailed data from that moment on. So for past data you should download it.

    Don't forget to put for the indicator "Calculate on the bar close" to false, or you will not see the indicator change permanently.
    Last edited by marcus2300; 11-24-2018, 06:15 PM.

    Leave a comment:

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