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I don't know the answer to your question, but remember that indicators
require time to stablize and AB automatically gets as many previous bars
as necessary to do so. For example, you will need 100 bars to get
MA(C,100). If you don't use pre-existing bars, the value of the array
will be either null or incorrect until 100 bars of data exist.
I do know if you check the equity curve there is no data before the
start date of your test regardless of how much data you have in your
database.
Terry
onlyobsession2k3 wrote:
>How come when I choose to view a specific date range in the auto-
>analyzer and then Ref() outside of that range I don't get null values?
>
>For example if I have:
>Buy = 1;
>Test = Ref(Buy,-1);
>
>Then I would expect on the very first bar of my date range that "Test"
>would NOT be 1, but it is. It seems to grab the data from the previous
>bar. How can I get it to treat that first bar like there is no previous
>data whatsoever?
>
>Thanks,
>
>Joel
>
>
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