Micheal,
Seeq can handle data down to the one nanosecond level which is 1,000,000,000 HZ I believe.
As far as the grid resolution you might be a little limited there but it does go down to 0.001 seconds. See screenshot below.
As for the plotting, the number of pixels the display has will likely limit the samples displayed. Seeq has a builtin algorithm to display the samples that best represent your data's profile during the range displayed.
I would caution you to reduce your display range to a reasonable amount before putting a hi-frequency signal on the screen. Seeq will need to query the data from the historian so it maybe a decent load on your database.
Regards,
Teddy