OnParamsChange

What is it?

The OnParamsChange method is called automatically when the user changes any parameter of your indicator — for example, the period, color, MA type, etc.

It allows you to respond to these changes and adjust your indicator's behavior or visuals accordingly.

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Syntax

public OnParamsChange(): void {
    // logic after parameter change
}

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When and Why to Use It

• This method is called after the user updates the settings in the indicator panel.

• Use it to:

  • Recalculate internal values

  • Adjust or re-create custom chart objects

  • Apply shifts, styling, or any other dynamic behavior

  • Update dependencies between parameters

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Example Use Case

Let’s say your indicator displays a shifted line or a custom label. When the user updates the "Shift" parameter, you want the line or label to move accordingly — that logic would go inside OnParamsChange.

public OnParamsChange(): void {
    // Example: Reposition a line or label when "VShift" is changed
    
    this.UpdateShiftedLine(this.VShift.value) // custom method UpdateShiftedLine
}

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Important Notes

• It only runs when the user changes something manually in the settings window.

• If you don’t need any custom logic after parameter changes — you can leave it empty.

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In Simple Terms

Think of OnParamsChange as the method that reacts to user edits in the settings panel. It gives you a place to respond to those changes and adjust the indicator’s behavior.