How to access EMA value of a bar inside OnRender()?

[Orion1504]

Hi! I have a NT8 indicator which plots lines under a clicked bar. In the onRender method it gets the clicked bar index with:

barIdx = ChartBars.GetBarIdxByX(chartControl, clickPixelX); <- This works already


How do I get the EMA(10) value of this clicked bar?

I have my EMA instancied correctly

private ema EMA;

else if (State == State.Historical)
{
ema= EMA(10);


but when I call

ema[barIdx] I get an out-of-bound exception.

What am I doing wrong? Thanks!

[NinjaTrader_Kate]

Hello Orion1504,

Thank you for your inquiry.

Unlike market data events and strategy order related events, there is no guarantee that the barsAgo indexer used for Series<T> objects are in sync with the current bars in progress. As a result, you should favor using an absolute index method to look up values. In this case, you could use GetValueAt():

https://ninjatrader.com/support/helpGuides/nt8/getvalueat.htm

Please let us know if we may be of further assistance to you.