off the ˈcharts. (about a score, number, price, etc.) far higher or better than normal: Gas prices are off the charts, making this an expensive winter for home heating. ♢ The response has been off the charts.

What does you are off the charts mean?

Outside of the normal range of measurement; beyond expectations.

Is off the charts good or bad?

MEANING: If something goes off the chart, it far exceeds the normal standards, good or bad, for something. ... Same definition as Off the Chain.