The chart draws with your graphics card, so two things matter most:
- Use Chrome. The chart runs best in Chrome at the moment.
- Turn on hardware acceleration in your browser. If OpenMarket keeps asking you to enable it, follow Stuck on Enable Hardware Acceleration screen.
Large grids and many data indicators, such as the heatmap and the footprint, give the chart more to draw. Close the charts and indicators you are not watching.
If the chart still lags, freezes or reloads when you zoom, send a report through Reach out with your browser, your computer and the layout you were on.