ATR indicator prior values not accessible

[love2code2trade]

i am trying to access prior ATR values based on a given period but the code errors out after bar 15 even though there are 1870 bars in the ATR series. below is the code and output window results. what does not make sense is the loop outputs 16 elements but it has a problem at bar 15. very confused.

protected override void OnBarUpdate() {
if(CurrentBar > 14)
return;
var count = ATR(14).Count;
Print(string.Format("ATR(14).Count: {0}", count));
for (int i = 0; i < count; i++) {
Print(string.Format("ATR[{0}]: {1}", i, ATR(14)[i]));
}
}

ATR(14).Count: 1870
ATR[0]: 3.54136297376093
ATR[1]: 3.56377551020408
ATR[2]: 3.60714285714286
ATR[3]: 3.55769230769231
ATR[4]: 3.58333333333333
ATR[5]: 3.68181818181818
ATR[6]: 3.85
ATR[7]: 3.91666666666667
ATR[8]: 4.09375
ATR[9]: 4.28571428571429
ATR[10]: 4.20833333333333
ATR[11]: 4.2
ATR[12]: 4.625
ATR[13]: 4.83333333333333
ATR[14]: 5.625
ATR[15]: 6.25

Error on calling 'OnBarUpdate' method on bar 15: You are accessing an index with a value that is invalid since it is out-of-range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart.

[NinjaTrader_Gaby]

Hello love2code2trade,

Thank you for your post.

Your CurrentBar check is causing the script to stop after the 14th bar.

if(CurrentBar > 14)

return;

This says "if CurrentBar is greater than 14, then return". To resolve, you can change this to:

if(CurrentBar < 14)

return;

Please let me know if you have any other questions.

[love2code2trade]

hi gaby,
thankyou for your reply. i have tried different permutations of your suggestion without success. i still get the same error. what i am trying to achieve is to be able to iterate over the the prior ATR values for each call to OnBarUpdate.

[NinjaTrader_Gaby]

Hello,

Thank you for your response.

Instead of looping to 'count', try looping to CurrentBar.

CurrentBar - https://ninjatrader.com/support/help...currentbar.htm

for (int i = 0; i < CurrentBar; i++) {

Print(string.Format("ATR[{0}]: {1}", i, ATR(14)[i]));

}

Please let me know if I can assist further.