FirstTickOfBar error?

[ATI user]

I am using this code:

if ( FirstTickOfBar )
Print (CurrentBar+" FirstTickOfBar xxx "+Time[0] );

and get the result shown in the screenshot attached.

How can the first tick occur on the same bar more than once...and at two different times?

Thanks.

[NinjaTrader_Dierk]

Please provide all info required to reproduce he problem.

[ATI user]

got your message re ticks...

actually running on a 500 vol bar chart....meaning it switches bars during the trade so both closing bar and opening bar are on same tick

makes sense....will need to adjust for that

thanks

[ATI user]

I assume you can not use FirstTickOfBar for volume charts, right?

I need instead to check CurrentBar against 'activeBar' and if different, then that is the first tick of a new bar

For instance, if you create a 250 volume chart and run a strategy that increases a barcounter variable using FirstTickOfBar...and on each first tick you print both the barcounter and CurrentBar, you will see that the barcounter increases faster than CurrentBar...therefore it is triggering at the start of each bar and also at the end of each bar in which the volume flows over to the new bar..i.e. counting twice

Is this something that could be or should be fixed at NT's end rather me using an active bar variable as stated above?

thanks.

[NinjaTrader_Dierk]

Not sure I follow. Are you saying FirstTickOfBar does not work for volume bars?

[ATI user]

yes... i am saying that...

run the test per below and you will see that for vol bars that carry the vol over to the next new bar will trigger FirstTickOfBar on BOTH the close of the old bar and the start of the new bar

i had to change the code as follows in all my indicators and strategies to check for CurrentBar change instead

..........in variables...............
// workaround FirstTickOfBar issue
private bool myFirstTickOfBar = false;
private int activeBar = 0;

.........first code run each tick
protected override void OnBarUpdate() {
if ( CurrentBar < 1 )
return;
if ( activeBar != CurrentBar ){
activeBar = CurrentBar;
myFirstTickOfBar = true;
}

....last code run each tick
myFirstTickOfBar = false;//end of first tick
} // END OnBarUpdate

[NinjaTrader_Dierk]

We'll look into.

[NinjaTrader_Christian]

Hi ATI user !

This is a bug, which will be fixed with the next update.

Thanks for reporting,
Christian

[palinuro]

Hi ATI user !

This is a bug, which will be fixed with the next update.

Thanks for reporting,
Christian

Hi,

Is this the same bug? The following executes twice per bar:

if (FirstTickOfBar)
{

string line = Time[0].ToString();
Print(line);
}
Time is the same at each print. But the second time it prints, in a more complex version preceding bar-based calculations are set to zero.

Thanks.

[NinjaTrader_Ray]

Could be or it also could be accurate. How do you know its the same bar?