VOLMA and the Calculate methods

[Ickbert]

Hello

I use the VOLMA function in my script to check if the current volume is larger or smaller than the average.

var color = Volume[0] > VOLMA(14)[0] ? Positive : Negative;

I do this every time the price change is calculated (OnPriceChange). My problem is that VOLMA gives the following error (see screenshot).
Why can't VOLMA do the calculation on every price change, only OnBarClose or OnEachTick?
I don't understand the Calculate methods correctly. Could someone please explain this to me? The NT Help Guide doesn't help me.

Thanks a lot!

[NinjaTrader_Jesse]

Hello Ickbert,

That message is based on how the indicator was designed, it either wants all of the tick data to operate or works OnBarClose when a fixed volume is available. You can certainly duplicate and edit the script to remove that and allow it to work for OnPriceChange, the warning is in the scripts OnStateChange -> State.Historical area.

[Ickbert]

Hello Jesse

Thank you!