How to calculate indicator value according to current price.

[sinpeople]

Hi,

I know OnBarUpdate() function is only called when bar close. But it could be a little bit too late if a bar takes too long to complete.

How can I calculate the new indicator value according to current change of market price, such that some decision can be made prior to the completion of the new bar.

I have some function needs to be done on a per-bar basis. It is Ok to be done when the bar close. How to separate those per-bar-basis function with those responding to the instant market change?

Many thanks!


Best Regards
David

[bltdavid]

If you use CalculateOnBarClose=False you can calculate on a tick-by-tick basis
inside your OnBarUpdate() handler.

However,
Inside your handler, when FirstTickOfBar is true, then you know that this tick
represents the first tick of a new bar, and therefore a bar close has just occurred.

protected override void OnBarUpdate()
{
    if (FirstTickOfBar)
    {
       .. per bar basis ..
    }
    else
    {
       .. per tick basis ...
    }
}

[NinjaTrader_ChelseaB]

Hello David,

bltdavid is correct for real-time data only, not historical.

FirstTickOfBar is true on the first tick of a new bar (meaning the previous bar just closed) when the scripts is processing real-time data with CalculateOnBarClose false.

https://ninjatrader.com/support/helpGuides/nt7/?firsttickofbar.htm

Adding a 1 tick series would allow for historical intra-bar actions as well.

http://ninjatrader.com/support/forum/showthread.php?p=442810#post442810

[bltdavid]

bltdavid is correct for real-time data only, not historical.

Ah yes... thank you, Chelsea.

Luckily, FirstTickOfBar is always true for every historical bar.

But yes, I should have said that my comments were for real-time data only.

My code, however, works correctly for both historical bars and real-time data,
regardless of the CalculateOnBarClose setting.