How the percent is calculated
Each tick compares the live price to the stored previous close. Down from previous close fires when that change is at or below the negative of your threshold. A 3% setting means -3% versus close. After 4:00 PM ET the live price is replaced by that day's regular close. If the close is missing or not positive, the monitor skips until a valid close exists.
Example: NVDA gaps through 3%
NVDA closed at $100. You save Down from previous close at 3%. Premarket at 8:00 Eastern the print is $96, which is -4%. The alert fires. Later the same Eastern day it trades $92 (-8%). No second email. Premarket and regular hours share one session date.
- •After the send it stays triggered. Turn it back on to watch the next close. The same Eastern day still stays quiet.
Price decreases by uses a different baseline
Price decreases by measures from the last price at the moment you saved the alert. A gap versus yesterday can trip Down from previous close while Price decreases by still sits quiet, because the create-time print never moved 3%.
How to set it up
- •On app.stockalert.pro, open create alert and pick the stock.
- •Under Price, choose Down from previous close, enter the percent (3, 5, 8, or 10 are the quick picks), then save.
Email and SMS both work. After a send, the alert stays triggered.
When this type fits
- •The gap or the open: how far today has already fallen versus yesterday's close.
- •One notification. Turn it back on if you want to watch again. The same Eastern day stays quiet.