built in bar time-span variable?

[joemiller]

The following 2 lines of code are in the OnBarUpdate region of my indicator, requiring manual update of BarsInADay to correspond to the current bar time-span I am using. Is there a built in bar variable providing the bar-time which I could use to make the BarsInADay calculation automatic?

BarsInADay=24;//60 minute bars
if (CurrentBar <= BarsInADay*2) return;//*2 because need 2 days

Should I invoke the same test in the strategy OnBarUpdate region also?

[NinjaTrader_Lance]

It sounds like you could get the same result by using the session end. Your bar will always be time stamped at the close.

In your example you could use first bar of session and a custom counter to say once two days have passed, begin processing.

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?firstbarofsession.htm

[joemiller]

Thanks very much for the help. I'm pretty sure I can figure out from here how to formulate the custom counter. However info on how to formulate the custom counter will be much appreciated.[ I realize I am unabashedly asking you to do my coding for me so will seriously fully understand if you do not respond ].

Also, Would it make any sense for me to invoke the same test in the strategy OnBarUpdate region as I am invoking in the indicator OnBarUpdate region?

[NinjaTrader_Lance]

You could do something like this (where sessionCount is a custom variable) in your OnBarUpdate

OnBarUpdate()
{
if (Bars.FirstBarOfSession && sessionCount < 2)
				sessionCount++;
			
if (sessionCount < 2) 

//rest of your code that gets handled at least 2 sessions are loaded
}
    return;

I do think it would be a good idea to have this in both your strategy and indicator if this is required for the indicator and the strategy uses it.

[joemiller]

Many thanks again for your valuable help.

[joemiller]

Regarding
if (Bars.FirstBarOfSession && sessionCount < 2) sessionCount++;

Bars.FirstBarOfSession is true if the bar is the first bar of a session; otherwise, false.

If && means Boolean 'and' [so far I haven't been able to verify that] then must I not set a custom flag saying a first bar has been encountered because FirstBarOfSession is false after the 1st bar?

Also I think the required number of bars encountered is not a constant value of 2, but depends on the bar-time [eg] one hour bars would require 48 bars to have lapsed for the required 2 days to have lapsed, not 2 bars?

[joemiller]

Kindly let me know if what I said in my most recent reply [just previous to this reply] is correct or incorrect ... in which case I can then take it from there [ie] I don't want to be following and working on a solution based on incorrect assumptions.

[koganam]

"sessionCount < 2" means 2 sessions, regardless the number of bars within each session, not 2 bars.

[joemiller]

Yep, I was confused alright.
Still not able to make your logic work even though I think I now know what the logic is doing ... nice little piece of code. I am beginning to understand and appreciate the richness of the NinjaScript function library. I have a lot with which to familiarize myself so am going to just use my code [ie]

BarsInADay=24;//60 minute bars
if (CurrentBar <= BarsInADay*2) return;//*2 because need 2 days

and will come back to streamlining it with your code later. Like most others, I'm in a time bind so don't want to mess with it any more at present.

[joemiller]

I am trying once again to make Lance's code work for me. Displayed below is my current attempt.
The two debug print statements tell me that sessionCount never changes [ie] always = 0. Therefore logic flow never goes beyond “if (sessionCount <= 3) return;”. Any thoughts or suggestions will be much appreciated.

static int sessionCount;
if (Bars.FirstBarOfSession) sessionCount++;
Print("time= "+Time);
Print("sessioncount="+sessionCount);
if (sessionCount <= 3) return;

[NinjaTrader_Lance]

You'll want to make sure

int sessionCount;

is not defined within OnBarUpdate()

If you place it within the variables section above this should work for you.

As is your variable is being reset every bar update.

Let me know if I can further assist.

[joemiller]

I should have been clearer and more detailed in my post. sessionCount is defined in the Variables region as follows so the problem must be elsewhere?
#region Variables
// Wizard generated variables
private int myInput0 = 1; // Default setting for MyInput0
// User defined variables (add any user defined variables below)
...
...
...
public double midptyestyest;
public int BarsInADay;
static int sessionCount;
#endregion

[NinjaTrader_Lance]

Hello,

In this case could you provide me with a simplified version of a complete script that replicates the error?

Located in (MY)Documents\NinjaTrader 7\bin\Custom\Indicator

[joemiller]

script is attached

Unmodified script is attached. I can strip it down if you prefer.

Many thanks for the help.

[NinjaTrader_Lance]

I've tested the script on my end and it appears to be working

I've attached the image I see

You may want to try deleting the script and then re-adding it. After re-adding it open any script and press F5 to compile.

If this doesn't resolve the issue please send mail to support[at]ninjatrader[dot]com and reference this thread