What an alert can watch

Every alert is one of a handful of kinds. Pick the one that matches the thing you actually want to be told about.

Price

• Price level cross: the stock price crosses a level you set.
• Price near greeks: the price against a Greek wall. Either gets near it, so you hear about it before it happens, or crosses it: above the wall is the positive side, below it the negative side, and you can ask for one direction or either. A crossing follows the wall, which moves as the chain does. To watch a fixed price be crossed, use Price level cross instead.
• Contract price cross: the price of one option contract, rather than the stock.

Dealer exposure

• Greek exposure move — everything about a Greek's dealer exposure lives in this one alert. Pick the Greek, then pick what counts as a move:

• Wall moves strike (the default) — the strike carrying the most dealer exposure moves to a different strike. This is the wall shifting, and it is the one most people mean. Any move, either direction, against the last reading.
• Positive wall moves strike / Negative wall moves strike — the same thing, but following only one side. Every exposure chart marks two walls: purple is the biggest positive exposure, yellow the biggest negative. These follow just the one you pick, where Wall moves strike follows whichever is larger and can hand over between them.
• Price crosses into negative exposure (or into positive, or either way) — the gamma flip. Going up the strikes, a flip level is a strike whose exposure has the other sign to the one below it; this goes off when the PRICE crosses one, never when a strike changes sign under a price that has not moved.
• Moves or flips — whichever happens first.

A flip never goes off just because it starts on that side. It needs a real crossing between two checks, so an "into negative" alert set while the price already sits in negative exposure waits for it to reach positive and cross back.

Volume and flow

• Volume spike: a stock's option volume jumps by the amount you set.
• Top-volume contract rotation: a different contract becomes the most traded one.
• Options flow: a big options trade comes through on your stock.
• New top flow and Top 20 flow: a stock breaks into, or drops out of, the market's most active options flow. These watch the whole market, so they need no stock.
• Options ratio: calls against puts. On open interest (checked once a day) or on the day's unusual flow (checked every hour). It goes off when the side in the lead flips, or when one side leads by the amount you set.

Technicals

• Technicals: one indicator crosses another, like the price over the 200 EMA.

Your own trades

• My trigger acts: one of your own triggers enters, exits, pauses or is deleted.

Two settings worth knowing

Fire once when the window opens. Most of these watch for a change, which means on a quiet morning they may not fire at all — and a workflow waiting on one never runs. Turning this on fires the alert once at the start of its window each day even with nothing changed, so a bound workflow gets that first look.

A narrower window. Alerts run through the session by default. Narrowing the window is how you say "only in the first hour", and it also stops a busy signal from firing all afternoon.

Set alerts up in the Alerts tab.