AutoScale OnRender() Without AutoScale for AddPlot() plots

[lunardiplomacy]

Hello all,

As the title suggests, I am developing an indicator for which OnRender() is used to render part of the visual and AddPlot() is used to render the rest. I am pretty much done, but the last issue I'm facing is that my custom rendered candlesticks are not AutoScaled and I want them to be. In addition, I would like the moving averages I have added through AddPlot NOT to be AutoScaled. How can I achieve this?

Additional Info:
- Using a fixed scale is not an option
- I am using base.OnRender() within my OnRender() method to ensure AddPlot() calls work
- Lastly, not sure if it's relevant here, but I am also calling OnCalculateMinMax() using the standard tmpHigh/tmpLow approach using the variables for the high and low of my custom rendered candlesticks.

Thanks in advance for any help you all can offer!

[QuantKey_Bruce]

In OnCalculateMinMax you should be setting MinValue and MaxValue to the high and low of your rendered candlesticks. You don't call OnCalculateMinMax - it's an event that is called that you override to set your own desired high and low for the scale.

Refer to this example: https://ninjatrader.com/support/help...lateminmax.htm

[NinjaTrader_ChrisL]

Hello, thanks for writing in. With IsAutoScale = true, OnCalculateMinMax will be called so you can customize the auto scaling behavior of your indicator. You would need to customize this event to center the chart around the highest/lowest values of your custom rendered chart objects. Here is one example that performs this scaling:

https://ninjatraderecosystem.com/user-app-share-download/heiken-ashi-8/

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[lunardiplomacy]

Hi Bruce and Chris,

Vernacular aside, I believe my custom call to OnCalculateMinMax is correct for what I am trying to accomplish. Perhaps one of you can take a look and tell me if anything is off?

I would add two things....
- my custom rendered candlesticks were able to scale just fine before I added the AddPlot() plots
- I am using base.OnRender(chartControl, chartScale) in OnRender(), does this somehow interfere with my OnCalculateMinMax override?

And question -- Bruce, are you telling me I should set AutoScale = true even though I don't want the AddPlot() plots to AutoScale? AutoScale just asks OnCalculateMinMax() where the min and max should be?

Thanks again for any help you can offer, code down below.

public override void OnCalculateMinMax()
{
base.OnCalculateMinMax();

if (Bars == null || ChartControl == null)
return;

for (int idx = ChartBars.FromIndex; idx <= ChartBars.ToIndex; idx++)
{
double tmpHigh = CDHigh.GetValueAt(idx);
double tmpLow = CDLow.GetValueAt(idx);

if (tmpHigh != 0 && tmpHigh > MaxValue)
MaxValue = tmpHigh;
if (tmpLow != 0 && tmpLow < MinValue)
MinValue = tmpLow;
}
}

[lunardiplomacy]

....because when I set AutoScale = true the min and max are the ma plots, not the rendered candlesticks

[lunardiplomacy]

UPDATE:

All set, the issue as I'm sure you would have spotted is that I was calling base.OnCalculateMinMax() which was causing the AddPlot() plot scaling to override my custom scaling.

When I removed this line the panel scaled to the rendered candlesticks and NOT the plots while AutoScale = true in properties.

Thanks