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. 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.
- •Next Eastern day the previous close is whatever NVDA actually closed at, for example $92.
- •The alert can fire again that day if the live price is -3% versus that new close.
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 returns to active and waits for the next Eastern calendar day.
When this type fits
- •The gap or the open: how far today has already fallen versus yesterday's close.
- •One ping per US session. Tomorrow can fire again against the new close.