DrawDot for Inside Bar

[devdas]

Hi,
Just started NinjaScripting. Experimenting with indicator dev. for InsideBar, but its not plotting desired dots when i employ on charts, strangly when i dev. a simple Strategy via wizard for same then dots were plotting. Copying the code from strategy to indicator also didnt help with indicator.
Also , why strategy wizard adds 'CurrentBar' with tag...

[NinjaTrader_Ben]

Hello,

Just started NinjaScripting. Experimenting with indicator dev. for InsideBar, but its not plotting desired dots when i employ on charts, strangly when i dev. a simple Strategy via wizard for same then dots were plotting.
>>I am sorry, what do you want the indicator to do exactly? Draw a dot based on what exactly? ("Inside bar" is defined different for different traders.)

Copying the code from strategy to indicator also didnt help with indicator.
>>This usually only works for small snippets. It is best just to start over with the indicator.

Also , why strategy wizard adds 'CurrentBar' with tag
>>The Wizard is adding the current bar number (which increases from left to right on your chart) to the tag to give you a unique name that will not repeat and mess up your other dots:

http://www.ninjatrader-support.com/HelpGuideV6/CurrentBar.html

[devdas]

I am sorry, what do you want the indicator to do exactly? Draw a dot based on what exactly? ("Inside bar" is defined different for different traders.)

I want indicator to plot a dot above the bar , which meets the condition,

(High[0] < High[1]) && (Low[0] > Low[1])

[devdas]

Hi,
i resolved the problem, as looked in to Log for error which was as

Error on calling the 'OnBarUpdate' method for indicator 'InsideBar' on bar 0: Index was out of range. Must be non-negative and less than the size of the collection.

So appplied solution as given in thread

http://www.ninjatrader-support2.com/vb/showthread.php?t=3170

and that resulted in desired action...



But now im more curious about behaviour of 'CurrentBar' term...why indicator failed to produce in absence of that line while data series contain thousands of data line....
Please suggest more information source about 'CurrentBar' nature and example.

[eDanny]

Hi devdas, maybe I can help while support is helping others. The reason the code didn't work before is because you are try to get a value from a bar that doesn't yet exist.

(High[0] < High[1]) && (Low[0] > Low[1])

You reference High[1] and Low[1] which are not there when the indicator starts and is on bar 0.

[devdas]

Hi devdas, maybe I can help while support is helping others. The reason the code didn't work before is because you are try to get a value from a bar that doesn't yet exist.

(High[0] < High[1]) && (Low[0] > Low[1])

You reference High[1] and Low[1] which are not there when the indicator starts and is on bar 0.

Yes, i already got this point, but it means first failure on bar 0, is cause for total drop of indicator plot... ...

[NinjaTrader_RyanM1]

Hello Devdas,

Yes, i already got this point, but it means first failure on bar 0, is cause for total drop of indicator plot... ...

Yes, this is true. For more information read the article below:
Make sure you have enough bars in the data series you're accessing.