Slack

Actions

• Trigger
• Message

Slack

Slack · at most every 4 h

This is how the node looks on the board: inputs on the left. As an action it sits at the end of the chain.

Message to a Slack channel. Sends the alert via webhook to a channel in your Slack workspace, for example for your team. Create the webhook once in Slack: create an app at api.slack.com/apps, turn on “Incoming Webhooks”, “Add New Webhook”, pick the channel and copy the webhook URL. Slack comes with the Community plan. Example: the alert “BTC Dip Buyer: RSI 14: 28.7 · Price: $81,616” appears as a message in the channel.

What it looks like

• signal true
• alert goes out
• held back
• cooldown running

The alert comes when the trigger switches from false to true. If it stays true, no second one comes. If it switches again during the cooldown, Bellchain holds the alert back (circle); the replay counts such cases as “held back by the cooldown”.

Settings

The settings appear on the right under “Properties” once you click the node on the board. Below each field you find the same explanation as here.

Webhook URL

Default: empty · any text, at most 200 characters, must be filled in before activating, empty when you export a chain

The webhook URL from Slack; it starts with https://hooks.slack.com/services/. Treat it like a password: anyone who knows it can post to the channel. That is why it stays empty when you export the chain.

At most every … hours

Default: 4 h · from 0 to 168 h

Cooldown: after an alert the action waits at least this long before the next one. 4 hours suit most chains. 0 means an alert every time the condition turns true.

Message

Default: {{chain}}: {{values}} · any text, at most 1,000 characters, multi-line

The alert text. {{chain}} inserts the chain’s name, {{values}} the values of the nodes, {{price}} the price; there are also {{pair}}, {{coin}} and {{time}}. Use **bold**, _italic_ and `code` to highlight text. If a message template is connected to the Message input, its text is used instead.

Example

Sends the message via webhook to your team’s Slack channel (Community plan).

How to connect the nodes:

1. Candle (Price) → RSI (Value)
2. RSI (RSI) → Compare (Value)
3. Compare (true/false) → Slack (Trigger)

On the board it reads: Slack · at most every 4 h

Chain as JSON

To try it, copy it and paste it in the editor under “Import”. Importing creates a new chain.

slack.json

{
  "name": "Example: Slack",
  "version": 1,
  "nodes": [
    { "id": "c1", "type": "core.candle", "position": { "x": 40, "y": 40 }, "settings": { "pair": "BTC/USDT", "timeframe": "1h" } },
    { "id": "r1", "type": "core.rsi", "position": { "x": 260, "y": 40 }, "settings": { "length": 14 } },
    { "id": "k1", "type": "core.compare", "position": { "x": 480, "y": 40 }, "settings": { "operator": "below", "value": 30 } },
    { "id": "s1", "type": "core.slack", "position": { "x": 700, "y": 40 }, "settings": { "url": "https://hooks.slack.com/services/T0123ABCD/B0456EFGH/abcdefghijklmnopqrstuvwx" } }
  ],
  "edges": [
    { "from": "c1.close", "to": "r1.in" },
    { "from": "r1.out", "to": "k1.in" },
    { "from": "k1.out", "to": "s1.in" }
  ]
}

Inputs and outputs

Only matching types connect: number series to number series (round pin), signal to signal (square), message to message (diamond).

Direction	Pin	Type	Note
Input	Trigger	Signal (true/false)	required
Input	Message	Message	optional
Output	–	–	No outputs.

Good to know

• Search also finds it under: notification, message, alert, slack, team, channel.

Technical details

POST to hooks.slack.com with mrkdwn text, no link previews; <, > and & are escaped, mentions such as @channel ping nobody. The delivery log keeps only team and hook.

• Type in the chain: core.slack · Version 1.0.0 · Category key act
• Settings in the chain: url (Webhook URL), cooldown (At most every … hours), message (Message)
• Pins in the chain: Input in, message
• Effect: notifies via Slack
• How a node is built