Hello
as lordv said, a copper move requires 8 lores pixel.
I think the "wait resolution" is actually 2 lores pixel,
since, if I am not wrong, the copper can wait for any horizontal posizion of the beam counter (the values read from VPOSR are compared with the values inside the wait instruction) and 1 increment in VPOSR (or DDFxxxx) equals to 2 lores pixels. However, to accomplish the wait, the copper lose one memory cycle, so when the wait is over, another 2 pixel are passed. But maybe I am wrong. For sure since the copper access ram only on odd (or only on even) VPOSR positinos, it read a word any 4 pixel. Since a copper move is formed by 2 words, you have the 8 pixels.
To have up to 100 copper moves per line, I think they change the "lenght" of the scanline, using programmable comparators
HSTART, HSTOP, etc. You can do this only on ECS and AGA (no OCS) and of course your display is not PAL anymore