It does not run every five minutes. A handful of our alerts and filter do that, but not this one. This compares the current price to the price 5 minutes ago. The idea is that if a stock takes off quickly, you don’t want to wait 5 minutes to be notified.
So we are comparing two prices. The most current price changes with every print. So that can change multiple times per second, depending on the stock.
The older print is precise to the minute. So if you are looking at 9:35, you will be comparing the last print to the price at 9:30. 59½ seconds you are still comparing the price to the price at 9:30. But at 9:36 you start comparing the current price to the time at 9:31.
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