We dont directly support a floor or minY axis view on the chart - i.e. the recipricol of chartMax() - however you can achieve this type of filter by changing your search to filter the output from the count function.
In the example below Im filtering the output of the count() function using lt() and gt(); notice how the functions TAG is used to associate the two (ideally we will support chaining).
What I want is to only show the IPs of customers which are hitting the specified URI X amount of times in the bucket or more, possibly being able to set the minY axis value? Is this possible or is there another way I could get this info do you think?
the resultant chart for this shows what we would expect and only those clientIps where there have been more than 100 entries in a 5 minute bucket, but when set up as an alert we just get everything from the log not just the IPs which met the criteria and it triggers all the time as well, not just if there is something to show on the chart or not.