Dynamic Graph Enhancement

I need an expert to add a moving point to my existing spreadsheet graph.

Requirements:
- The graph is currently a line graph.
- The moving point represents performance metrics.
- The point must instantly update its position based on changes in the spreadsheet.

Ideal Skills and Experience:
- Proficiency in spreadsheet software (Excel, Google Sheets, etc.)
- Experience with dynamic graphs and real-time data updates
- Strong understanding of performance metrics and data visualization

Please provide examples of similar work done.