Hello,

I'm writing a PHP-based API around some data that is updated as frequently as once a minute, or as infrequently as once every 15 minutes. I'd like to have a cron job push alerts to end users when certain criteria is met (e.g. data goes above a certain threshold), but because my data changes so rapidly and is prone to wild fluctuations, I'm not entirely sure how to approach this. For reference, users can include, for example, people who have downloaded my Pebble smartwatch app, or my upcoming mobile phone app.
I'm more than happy to do some reading and learning. I just didn't exactly know what to search for, as I'm not dealing with something like storage space (where you can send an email if it hits < 20%, and it's unlikely that the storage will fluctuate between 20% and 21%, causing repeated messages) or rare events like CPU usage that you can alert if it stays high for longer than x many minutes

Please help.

Thanks!

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