Chart resolution has deteriorated as seen by comparing the two attached chart fragments. Pic size, all parameters, scaling, etc. are exactly the same in the two pics -- they are both grabbed from the same chart window that I haven't changed since the July pic. I use a 2-px price line width and ALMA (blue), 1-px EMA (brown). You might be able to discern that on the July chart, the dots of the background grid are visible, but they and all the drawn lines (including volume bars, not shown here) are smeared on today's chart.
I can't be sure but I think the change occurred in v.1.1.8735.1 x64. I am on Win10 on a 1920x1200 monitor. As you can see from the y-axis text, I have no problem with resolution of other features like text, nor in any other programs.