Braille may also work, and has the benefit of being more compact. If two dots represents a point, an example might be ⣤⣀⣀⣀⡤⠴⠚⠛⠒⠒⠲⣀ (usually terminal fonts hide

Braille may also work, and has the benefit of being more compact. If two dots represents a point, an example might be ⣤⣀⣀⣀⡤⠴⠚⠛⠒⠒⠲⣀ (usually terminal fonts hide the white dots). You only get 4 horizontal ticks, but also can do a "interpolation" (like ⠑) that gets you an extra 3.