How to force an indicator to recalculate it's values?

[boreland]

I have placed some up and dn buttons on the menu bar to change the deviation value for the Zigzag indicator. How can I force the ZigZag indicator to recalculate(). Update() does not do it since everything is already up to date on the current bar.

[NinjaTrader_ChelseaB]

Hello boreland,

There are no supported methods to reload a single NinjaScript.
An alternative would be ReloadAllHistoricalData() which will reload all of the historical data for all scripts on a chart including the host strategy (or host indicator).

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

The indicator method can be called with a different set of parameters and this would generate a new instance of the indicator.
Each time the indicator is called with a specific set of parameters the instance is cached and kept alive in memory until the host instance is disposed.
Calling the indicator with a new set of parameters would cause a new instance to be created that will have to re-process all of the historical data (and real-time data received).

If indicator is being called dynamically in OnBarUpdate(), this would allow you to use the values from this in the strategy as you would like for calculations and conditions.
However the indicator could not be added to the chart with AddChartIndicator() as this is only designed to be called during State.DataLoaded before OnBarUpdate begins processing.

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

[boreland]

I added ReloadAllHistoticalData() to:

private void upButton_Click(object sender, RoutedEventArgs e)
{
System.Windows.Controls.Button button = sender as System.Windows.Controls.Button;
if (button != null)
{
DeviationValue = DeviationValue + 0.2;
myTxtBox.Text = DeviationValue.ToString();
ReloadAllHistoricalData();
}
}

but it does not work. Reloading all historical data from the context menu does work however?

[NinjaTrader_ChelseaB]

Hello boreland,

I had hoped that this would work outside of OnConnectionStatusUpdate() but it looks like that will not be the case.

An unsupported idea would be to use SendKeys.SendWait("{F5}");

[hedgeplay]

Hi Chelsea,

I saw there is a similar topic active today (a topic relating to ReloadAllHistoricaldata() ) but I did not want to post anything that might disrupt that OPs active thread so posting here.

I am posting to request a feature enhancement to make ReloadAllHistoricaldata() available via Ninjascript calls from

1) OnStateChange() from DataLoaded and later states

2) OnBarUpdate()

For Strategies, Indicators and AddOns.

While searching for a solution I found the following links supporting the idea this is a common need.

https://ninjatrader.com/support/forum/forum/ninjatrader-8/indicator-development/1152057-custom-button-for-reload-all-historical-data

https://ninjatrader.com/support/forum/forum/ninjatrader-8/indicator-development/1086791-reload-all-historical-data

https://ninjatrader.com/support/forum/forum/ninjatrader-8/indicator-development/104236-possible-to-rewind-indicator#post528720

https://ninjatrader.com/support/forum/forum/ninjatrader-8/platform-technical-support-aa/94772-reloadallhistoricaldata#post775540

https://ninjatrader.com/support/forum/forum/ninjatrader-8/indicator-development/1065943-tick-refresh

Possibly an old related Feature Request, but also possibly complicated with other issues ... https://ninjatrader.com/support/foru...338#post827338


Thanks for your time,
HedgePlay

[NinjaTrader_ChelseaB]

Hello HedgePlay,

I will submit your request.
Thanks for sending this in.

Once I have a tracking ID I will post in this thread.

[hedgeplay]

Thanks Chelsea!

[NinjaTrader_ChelseaB]

Hello HedgePlay,

This request to call ReloadAllHistoricalData() outside of OnConnectionStatusUpdate() is being tracked with ID# SFT-1869.

Please note, we receive many requests and cannot reasonably implement all requested features or changes. Interest is tracked internally and if enough interest is tracked, it would be weighed against how feasible it would be to make those changes to consider implementing, so we cannot offer an ETA or promise of fulfillment.

When new features are implemented, they will be listed in the Release Notes page of the Help Guide. The ID number may be different than the internal feature request tracking ID, but the description of the feature will let you know if that feature has been implemented.

Release Notes - https://ninjatrader.com/support/help...ease_notes.htm

[hedgeplay]

Thanks for the followup Chelsea.

HedgePlay

[Mubeen Haider]

Hi, can I vote for implementation of ID# SFT-1869? If yes, please consider my vote.

[NinjaTrader_ChelseaB]

Hello HedgePlay,

Thanks for your voice on this.

I've added your vote to SFT-1869.