Hi Tim,
If you use the AnyChart module from Mendix marketplace, you have much more freedom to customize charts with json.
refer to:
https://docs.mendix.com/refguide/charts-any-building-blocks#1-introduction
https://docs.mendix.com/howto/front-end/charts-any-usage
Then you can check out the Plotly syntax for log plot:
https://plotly.com/javascript/log-plot/
Should work with anychart widget indeed. Code sample found https://codepen.io/plotly/pen/rVRvdg