How alerts work - Spreader

Alerts need an account. Guests see a lock on Tools › Alerts and Settings › Alerts. Two places matter:

Tools › Alerts (/tools/alerts) lists your rules and lets you create, edit, pause and delete them.
Settings › Alerts (/settings/alerts) holds the delivery channels and the language of messages, see Channels.

Kinds of rules

Kind	What it watches	Where to create it
filters	A snapshot of scanner filters. Fires when a route newly enters them.	Scanner Alert › Copy the current filters, see From the scanner.
page	The saved filters of a scanner page, whatever they are at that moment.	Scanner Alert › Follow this page.
pair	One direction of one pair: a threshold on In net, Out net, gross spreads, APR, break-even or funding spread, or a change over time.	Spread page Alert › Spread of this pair, see Pair and market.
market	A metric of one market, of all markets of a coin or of all markets on an exchange.	Spread page Alert › Long market / Short market, asset header Alert, Loans Alert, or New alert… on the Alerts page.

A filters rule without In or Out bounds is treated as a rates rule (APR and funding) and gets quieter defaults, see Protections.

The Alerts page

The counter reads N of Max. New alert… opens the wizard What to watch with Spread or rates by filters (points you to a scanner page) and A market metric. The line engine: N rules in work confirms the server is checking rules, engine: waiting for the core means delivery is paused.

Column	Meaning
State	`active`, `off`, `paused: storm` (auto-pause after too many firings), `paused: page too wide`, `done` (a once rule that fired).
Rule	Name and a summary: filter chips, the pair or the market and the threshold.
Kind	filters, page, pair or market.
Mode	When a route enters, Each time it crosses, Once then switch off, Repeat while it holds.
Channels	Telegram, Browser, Pushover or `all enabled`.
Fired	Number of firings and the last one.

Row actions: Enable or Disable, Resume after a pause, Edit (opens the same editor as creation) and Delete. Deleting removes the rule and its history of firings.

Limits

Limit	Value
Rules per account	10
Directions a filters or page rule may match	5 000. Wider rules are refused with narrow it and a page rule is paused as `page too wide`.
Test messages per channel	1 per 30 seconds

Each rule can also be paused by its own Auto-pause protection. The bot command /alerts pauses and enables rules from Telegram, see Telegram bot.