how to update/recalculate/display plots without OnBarUpdate()

[dtl-saw]

I'm writing an indicator and have a Series<double> that is plotted on a chart.
I'm using either a left mouse click or hot keys to change the starting bar for the calculations of the Series<double>.
This is working fine except that I'm using OnBarUpdate() for calculating the Series<double> which I think is normal procedure but a problem occurs when the market is closed and OnBarUpdate() isn't called. So, when the market is closed the plot doesn't get updated.
I've tried ForceRefresh() but it doesn't trigger the OnBarUpdate().
I'm using OnRender() to process the mouse clicks and I've tried to recalculate the Series<double> and update the display there without success.

Do you have a way to force an OnBarUpdate() event or a different approach to updating my indicator plot so that calculations and display happen immediately instead of waiting for an OnBarUpdate()

[NinjaTrader_Jesse]

Hello dtl-saw,

Thank you for the post.

If the market is closed OnBarUpdate will no longer be called as there are no more bars to process. What is the need to do the calculation at this time? Is this to update the final plot value?

There won't be a lot of options here if the logic needs to remain in OnBarUpdate, you may be able to recalculate the value in the button press event depending on what the calculation is. Button events have a different context so instead of using BarsAgo you would use the GetValueAt or would need to wrap the code in a TriggerCustomEvent.

One other idea is to add and remove a drawing object, if the problem is that there is not any data to drive rendering that may be a solution. Removing an object will force a redraw.

I look forward to being of further assistance.

[rare312]

Hello.
I'm using ChartControl.MouseDownPoint to draw a Line on the chart.
But only because I need a Price Marker to be drawn as well, I have to set it's value in OnBarUpdate method.
So, my line and marker work correctly but with big delay. It depends on bar's updates.
I'll attach this code. Could you please help me to improve it.
I want it to change position immediately after mouse clicks.
Thank you.

MarkerByClick.zip

[NinjaTrader_Jesse]

Hello rare312,

ChartControl.MouseDownPoint is generally used with OnRender to do actions. You could use OnRender to draw the line which would be updated more frequently. There is a sample showing a print in the following page: https://ninjatrader.com/support/help...MouseDownPoint

One way would be to always draw the line and reference the ChartControl.MouseDownPoint from OnRender. If that changes the line would be updated. You could also make logic surrounding whatever you have now that incorporates OnRender. Drawing from OnRender would be the solution to have it update faster or with the mouse event.

I look forward to being of further assistance.

[rare312]

Hello rare312,

ChartControl.MouseDownPoint is generally used with OnRender to do actions. You could use OnRender to draw the line which would be updated more frequently. There is a sample showing a print in the following page: https://ninjatrader.com/support/help...MouseDownPoint

One way would be to always draw the line and reference the ChartControl.MouseDownPoint from OnRender. If that changes the line would be updated. You could also make logic surrounding whatever you have now that incorporates OnRender. Drawing from OnRender would be the solution to have it update faster or with the mouse event.

I look forward to being of further assistance.

I know What are you talking about. It was previous step. Now I want the Price Marker to be drawn as well. Only that's why I had to use Plots and OnBarUpDate method. I thought I was clear enough in my previous post.
So the question is how to add the price marker and to make possible the line and marker change their position at the same time and immediately after mouse click.

[NinjaTrader_Jesse]

Hello rare312,

For the plot to be updated more quickly you would need to use OnEachTick processing, that would allow you to reset the plot to the new value more quickly from OnBarUpdate.

I look forward to being of further assistance.

[rare312]

Hello rare312,

For the plot to be updated more quickly you would need to use OnEachTick processing, that would allow you to reset the plot to the new value more quickly from OnBarUpdate.

I look forward to being of further assistance.

I did. Still not fast enough.
More faster was to use OnMarketDepth rather than OnBarUpdate.
I think I'm done with using Plots.
Could you please help me to add a Paint Event Handler.
I still can not add it to existing Windows.Controls
I want to use PaintEventArgs for drawings in UserControlCollection

[NinjaTrader_Jesse]

Hello rare312,

The other way to draw would be to use DirectX which is the OnRender override. The UserControlCollection can be used to add WPF controls but that would not be a good rendering outlet over the existing chart, you could use the Chart to render.

You can find a sample indicator that comes with NinjaTrader called SampleCustomRender that showcases a lot of rendering concepts.

https://ninjatrader.com/support/help...htsub=onrender


Please let me know if I may be of additional assistance.

[rare312]

It will be impossible to draw directly on the price panel in that case. Like default Price marker does.
Is it correct?

[NinjaTrader_Jesse]

Hello rare312,

Correct the only way to get a PriceMarker in the price scale is to use a plot. You can otherwise draw anywhere in price panel using OnRender.

I look forward to being of further assistance.

[rare312]

What I know for sure, that's not the only way.
They did use PaintEventArgs in NT7 for creating custom pricemarker.

https://ninjatraderecosystem.com/user-app-share-download/custom-crosshair/

I'll try to do the same for NT8.

[rare312]

Hello rare312,

Correct the only way to get a PriceMarker in the price scale is to use a plot. You can otherwise draw anywhere in price panel using OnRender.

I look forward to being of further assistance.

Hello Jesse.
As I mentioned before, we still have some ways.
One of them I want to share with the community. I found many questions for custom price marker with no solution examples.
I did use wpf control - label. added to UserControlCollection.
Double click creates a line with price marker.
F5 - removes it.
fill free to improve it for your needs.And share it here..)

MarkerByClick2.zip

[rare312]

Hi guys.
My previous post is good for other development things. But it's not right way for such simple task as PriceMarker.
We can use OnRender method for this kind of drawing.
This tool will perfectly show you how to do it
https://ninjatraderecosystem.com/use...-drawing-tool/

[sidlercom80]

Hi guys.
My previous post is good for other development things. But it's not right way for such simple task as PriceMarker.
We can use OnRender method for this kind of drawing.
This tool will perfectly show you how to do it
https://ninjatraderecosystem.com/use...-drawing-tool/

Hello rare312, I would be interested if you have found a solution to draw a price marker in OnRender? If so, would you tell me your solution ?

[rare312]

Hello rare312, I would be interested if you have found a solution to draw a price marker in OnRender? If so, would you tell me your solution ?

hello. Did you check those [Vertical Line All Panels Drawing Tool] I've linked to? You will find the code how to do it.