# Example - Dynamic Resizable Quoteboard With Live/Test Data

**URL:** <https://community.plotly.com/t/example-dynamic-resizable-quoteboard-with-live-test-data/77813>\
**Category:** 📊 Plotly Python\
**Tags:** show-and-tell\
**Created:** [August 17, 2023, 4:05am UTC](https://community.plotly.com/t/example-dynamic-resizable-quoteboard-with-live-test-data/77813 "2023-08-17T04:05:40Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![AnnMarieW](https://avatars.discourse-cdn.com/v4/letter/a/ec9cab/32.png) [@AnnMarieW](https://community.plotly.com/u/AnnMarieW)\
**Post date:** [August 17, 2023, 5:29pm UTC](https://community.plotly.com/t/example-dynamic-resizable-quoteboard-with-live-test-data/77813/2 "2023-08-17T17:29:56Z")

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Hi @TallTim

Thanks for sharing - those are great looking cards!

You might have missed one of my comments in a [previous post](https://community.plotly.com/t/example-chart-selection-callback-iframe-output-scrollable/77683/2) - **It is not recommended to updated global variables in a Dash callback.** It can lead to unpredictable results.

For more information, please see the Dash documentation:

# [Why Global Variable WIll Break Your APP](https://dash.plotly.com/sharing-data-between-callbacks#why-global-variables-will-break-your-app)

> **[Part 4. Sharing Data Between Callbacks | Dash for Python Documentation | Plotly](https://dash.plotly.com/sharing-data-between-callbacks#why-global-variables-will-break-your-app)**
>
> Global variables will break your Dash apps. However, there are other ways to share data between callbacks. This chapter is useful for callbacks that run expensive data processing tasks or process large data.

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_[View the full topic](https://community.plotly.com/t/example-dynamic-resizable-quoteboard-with-live-test-data/77813)._