Intervention time slider is too hard to drag w touchpad on Chrome

Maybe it is my Windows laptop’s touchpad, but I find the intervention slider from the chrome extension very hard to drag without mouse, when using just the touchpad. I am not talking about the size of the circle, which is small, which is a good thing, requiring some effort to select. But once you have clicked the dot and try to slide it to the right, the right index has to follow a very, very straight line on the touchpad. This is easy to do with an accurate 600dpi+ mouse (I’d argue even effortless) - but hard even with a very sensitive touchpad with adjusted settings. It is hard to keep an exact straight line while pressing to keep it selected. Sometimes I keep the line straight during dragging but the mousepad clicks back and thus deselects.
So I got one idea, but this probably makes it too easy to select a time: introducing arrow key support for the slider. But instead of making it a continous press, where one long right arrow key selects the complete time range in one go, it could be made incremental only. So in order to select 10 out of 15 minutes of the slider, the user would have to press 5 times (one arrow key is 2 minutes) or 10 times (one arrow key is literally one minute). I don’t know if Chrome extensions can detect touchpad vs mouse, because then it would be easier to implement a fix. Or maybe a specific touchpad gesture could be set (like swiping two fingers from left to right) - but this could conflict with Windows Gestures. The Android app intervention slider is great though, but that’s touchscreen tech, not touchpad tech.