Bars GetHigh showing errors sometimes

[PWillard]

Hi,
I am using Bars.GetHigh(CurrentBar - 1)
But maybe once a day I get an error saying this
"Object reference not set to an instance of an object"
Can someone please let me know how can I avoid this!

[NinjaTrader_BrandonH]

Hello PWillard,

Thank you for writing in.

The error is advising that something you are accessing has not been created at the time you are accessing it.

If you are wanting to get the High value of the previous bar, you could use High[1] instead of Bars.GetHigh(Currentbar - 1).

See this help guide link for more information - https://ninjatrader.com/support/helpGuides/nt8/high.htm

Ultimately, to understand why the script is behaving as it is, such as placing orders or not placing orders or drawing objects when expected, it is necessary to add prints to the script that print the values used for the logic of the script to understand how the script is evaluating.

In the strategy add prints (outside of any conditions) that print the values of every variable used in every condition that places an order along with the time of that bar. Prints will appear in the NinjaScript Output window (New > NinjaScript Output window).

Below is a link to a forum post that demonstrates using prints to understand behavior and including a link to a video recorded using the Strategy Builder.
https://ninjatrader.com/support/foru...121#post791121

Please let me know if I may further assist