Alerts for Stock Prices
What They Do and Don't Do
"Alerts for stock prices" covers everything from a free price-threshold ping on your brokerage app to a rules-based scanner that hunts low-float micro-caps 24/7. This guide breaks down the types, the setup, and the real limits so you know what you're actually getting before you rely on one.
Last updated: 7 July 2026 · Educational, not financial advice.
What Are Stock Price Alerts, Really?
A stock price alert is a notification that fires when a security hits a condition you (or a system) set in advance. The simplest version is a price threshold: "tell me when XYZ crosses $10." That's the version built into almost every brokerage and free finance app.
A more advanced version is a multi-condition alert, where a piece of software checks a stock against several criteria at once - price, volume, float size, relative strength, time of day - and only sends a notification when all of them line up. These two things get lumped under the same search term, but they solve very different problems. A single-condition alert tells you a number was crossed. A multi-condition alert tries to flag a specific pattern.
The Main Types of Alerts You'll Run Into
Most alert systems fall into a handful of categories:
- Price threshold alerts - fire when a stock trades above or below a set price.
- Percentage-move alerts - fire when a stock moves up or down a certain percent from open, prior close, or a moving average.
- Volume spike alerts - fire when trading volume jumps well above its normal average, often a sign something is changing.
- Technical/indicator alerts - tied to things like RSI, moving average crossovers, or breakouts of a prior high or low.
- News and halt alerts - triggered by press releases, SEC filings, or trading halts.
- Scanner-based alerts - combine several of the above into one rules-based system that only notifies you when every rule is met at the same time.
Free tools usually give you the first two. Paid scanners and services tend to specialize in the last one, because stacking conditions is where the real filtering work happens.
How to Set Up Price Alerts (Free and Paid Options)
If you just want basic price or percentage alerts, most brokerage apps (Fidelity, Schwab, Robinhood) have this built in for free, and platforms like Yahoo Finance and TradingView let you set alerts across any watchlist without a brokerage account. These work fine for tracking a small list of tickers you already know.
The gap shows up when you're trying to find opportunities you don't already know about. Scanning the entire market for a specific combination of float, volume, and price behavior every few minutes isn't something you can do by hand or with a basic alert app - it requires software built specifically for that job. This is where dedicated scanning services come in, and it's worth reading a alert-services comparison before picking one, since they differ a lot in what they actually scan for and how transparent they are about results.
What Alerts Can't Do For You
An alert is a notification, not a recommendation. It tells you a condition was met - it doesn't tell you what happens next, and it doesn't account for your account size, risk tolerance, or timing. Every alert system, no matter how well built, will produce false positives: setups that look right and then go nowhere.
There's also a lag problem. Even a fast scanner checking the market every few minutes is reacting to a price move that's already started. That's simply the nature of scanning - it's not a flaw unique to any one tool, but it's a limit worth understanding before you treat an alert as a green light. Whatever the alert flags, the research, position sizing, and decision-making is still on you.
Why Low-Float Micro-Caps Need a Different Kind of Alert
Low-float stocks - shares with a small number of tradable shares available - can move a lot faster and harder than large-cap names, because it takes less buying or selling pressure to shift the price. A generic percent-move alert built for a mega-cap portfolio often misses these moves entirely, or catches them after most of the move already happened. If you're unfamiliar with the mechanics, the low-float explainer covers why float size changes how a stock trades.
Because of this, alert systems built specifically for low-float micro-caps tend to weigh float size and relative volume much more heavily than standard alert tools do. That's a narrower, higher-risk corner of the market - these stocks can also reverse just as fast as they move - so the tradeoff for speed is volatility.
What to Look for in an Alert Service
If you're evaluating a paid alert service, the single most useful thing to check is whether they publish their full history - wins and losses both. A service that only shows its best trades isn't showing you the real picture. Look for a system with clearly defined, fixed rules rather than a person manually picking favorites, since fixed rules can be checked and backtested, while discretionary picks can't.
It's also worth understanding how the method works before subscribing to anything - what exactly triggers an alert, how often the market gets scanned, and what happens after the alert fires. And any claimed track record should be verifiable, not just a screenshot. A complete public track record that logs every alert, including the ones that didn't work, is the baseline for trusting any performance number you see.
Where Ignition Fits
Ignition Alerts is one tool in this space, not a guru service. It scans the entire US market every 15 minutes for low-float micro-caps and only sends an email when a stock clears all eight of its fixed conditions - no discretionary picks, no cherry-picked examples. Every alert, win or loss, is logged publicly. As one reference point: 25 alerts have exceeded +100% to date (best: MTEN +765% from $1.1) - full unfiltered log at https://ignitionalerts.com/performance.html. That number sits alongside the losers in the same log, which is the point - it's meant to be checked, not just believed.
- "Alerts for stock prices" ranges from simple free price triggers to rules-based scanners checking multiple conditions at once.
- An alert is a notification, not a signal to act - the research and risk decisions are still yours.
- Low-float micro-caps need alert systems that weigh float size and relative volume, since generic alerts often miss or lag these moves.
- The clearest sign of a trustworthy alert service is a full public log of wins and losses, not a highlight reel.
Risk disclaimer: low-float and micro-cap stocks are among the most volatile, illiquid securities in the market; total loss is possible and nothing in this article is financial advice. Ignition Alerts is a research tool - it never tells you to buy or sell. Read the full risk disclosure.
Frequently asked questions
What's the difference between a price alert and a stock alert service?
A price alert is a single trigger, like being notified when a stock crosses $10. A stock alert service typically runs multiple conditions at once - price, volume, float, and technicals - and only notifies you when all of them align.
Are stock price alerts free?
Basic price and percentage alerts are free through most brokerage apps and sites like Yahoo Finance or TradingView. More advanced, multi-condition scanning across the whole market is usually a paid service, since it requires dedicated infrastructure to run continuously.
Can a stock alert guarantee a profitable trade?
No. An alert only tells you a specific condition was met at a specific time - it says nothing about what the price will do afterward. Every alert system produces false positives, and past results never guarantee future ones.
What should I check before trusting an alert service's track record?
Look for a full, unfiltered log that includes losing alerts, not just winners, and confirm the alert rules are fixed and disclosed rather than discretionary. If a service can't show you the losses, treat any performance claim with caution.