Polymarket and Kalshi Price Alerts

The five alerts you can set on any market

A new alert starts with large trades and the resolution turned on. Add price levels and a price move when you want them. Every setting is saved per market, so your election markets and your Sunday games can behave differently.

Price level

Type a price in cents and choose a direction. "Rises to 60" fires when the market climbs to 60 cents. "Falls to 35" fires when it drops to 35. Rivo confirms the price held before it sends, so every alert is a price the market really traded at.

Choose once for an entry or an exit you plan to act on a single time. Choose every time for a level you want to keep hearing about. A repeating level fires again after the price has pulled back three points and crossed a second time.

Price move

A price move alert watches the last hour. If the market is 10 points higher or lower than it was at any moment in that hour, you get one message. It then stays quiet for an hour, so a fast market sends you a handful of messages a day and never a stream.

Large trades

Every large trade Rivo records in the market reaches you as it happens. Set a smallest trade of $1K, $5K, $10K or $25K to hear only the size you care about. On Polymarket and Kalshi the alert carries the trader's name when the trade has one, and you can ask for named traders only.

Activity surge

Some of the best signals come before the price moves. When a market trades three times its usual hourly volume, something has changed: news, a lineup, a leak, a ruling. The surge alert tells you the dollar volume of the last hour and the current price, at most once every six hours per market.

Resolved

When the venue settles the market, Rivo sends the result. It is the alert people forget they want until a position pays out at three in the morning.

Get notified when the odds move

A price in a prediction market is a probability. When it moves, somebody learned something or somebody is betting that they did. The alerts are built to put you in front of that move while the price is still close to where it started. Three moves from September show how each alert reads it.

• The Fed in October. The "no change" market sat at 32 cents, then took 20 large trades in an hour and reached 52. A level at 40 would have reached you on the way up, a 10 point move alert a few trades later, and the large trade alert on each of the 20 trades behind it.
• The Los Angeles mayoral race. In the same hour, Nithya Raman went from 46 to 59 and Karen Bass from 56 to 44. One alert on each outcome tells you both halves of the story: who gained and who lost ground.
• Spain on September 26. Spain's price went from 48 to 65 in one hour and from 60 to 20 in the next, on $1 million of large trades, before Spain won. A level at 60 on the way up and a second at 40 on the way down would both have fired inside two hours.

Which alert to set for each kind of market

Pick your price before the market gets there

A contract pays $1 if it wins, so the price you buy at and the price you sell at decide everything. The best time to choose both is before the market moves, when you are calm and the number is a plan. A price level turns that plan into a message on your phone.

Here is what an exit level is worth. If you bought at the first price and your alert fires at the second, selling there locks in this much on every $100 you put in, before venue fees:

A position bought at 40 cents and sold at 70 returns $75 on $100 without waiting for the result. Set the level the day you buy and the market does the watching.

Three set-ups that work

• The entry hunter. You like a market at 45 cents and it trades at 58. Set "falls to 45", once. You hear the moment it gets there and you buy at the price you chose, not the price you chased.
• The exit planner. You hold a position bought at 40. Set "rises to 70" to take profit and "falls to 28" to cut it, and keep the resolved alert on. Three alerts cover every way the position can end.
• The news watcher. You follow an election and do not want to stare at it. Set a 5 point move alert, large trades from $10K with named traders only, and nothing else. Weeks of silence, then the message that matters.

Polymarket price alerts

To set a Polymarket price alert, open the market in Rivo, tap the bell and type a price. Two things make Polymarket alerts different from the rest.

• Every outcome gets its own alert. A Polymarket election is one market per candidate. On September 22 Nithya Raman went from 46 cents to 59 in the Los Angeles mayoral race while Karen Bass fell from 56 to 44. Set a level on the candidate you care about and the alert names them.
• Large trades come with a name. Every Polymarket trade is tied to a public wallet. When ripley86alien put $114K against Spain on September 26, the alert said so. Open the trader to see their record, and follow them if it is good.

Polymarket prices move less often than Kalshi prices. 15% of its markets moved 10 points inside an hour in September, against 36% on Kalshi. So a move alert on Polymarket is rare and worth reading when it comes. Start with 5 points. The Polymarket whale tracker shows the trades behind each move as they happen.

Kalshi price alerts

A Kalshi price alert is set the same way: open the market, tap the bell, type a price.

Kalshi is where prices move fastest, and the NFL shows why. On the night of September 28, Philadelphia started the hour at 64 cents to beat Chicago and ended it at 32, on 40 large trades worth $110K. A day earlier the Rams went from 51 cents to 66 against Denver in one hour.

For a live game, set your levels before kickoff. A move alert on a game fires on the first score and tells you what you already know. A level at the price you would buy or sell at tells you the one thing you were waiting for. On the short Bitcoin and Ethereum ranges, use a level set to every time, because the price crosses the same number several times a day.

Kalshi notifications

Rivo sends Kalshi notifications for any market you pick: it hit your price, it moved 10 points, someone bought $25K of it, it settled. They arrive on Telegram nearly instantly, and the Kalshi whale tracker shows who is trading it.

Set a price alert in under a minute

You can watch 50 markets at once across Polymarket, Polymarket US, Kalshi and Gemini. They sit on your Alerts page next to the traders you follow. The bell there pauses a market and keeps its settings, so you can switch a game off at full time and a Fed market back on the week of the meeting.

Price alerts follow a market. To follow a trader instead, use whale alerts. To compare one market's price on every venue before you set a level, use the live odds pages.

Price alerts for developers

Every alert can go to your code. Register a webhook and each one arrives as a signed market.alert event. Set alerts over the REST API, or have an AI agent set them through the MCP server with set_market_alert. The developer documentation has the endpoints.

Frequently asked questions