Cryptocurrency dip alerts for Bitcoin & Ethereum via Telegram, Slack & SMS
📉 Buy the Dip Alert (Telegram/Slack/SMS)
📌 Overview
This workflow automatically notifies you when Bitcoin or Ethereum drops more than a set percentage in the last 24 hours. It’s ideal for traders who want to stay ready for buy-the-dip opportunities without constantly refreshing charts.
⚙️ How it works
- Schedule Trigger — runs every 30 minutes (adjustable).
- HTTP Request (CoinGecko) — fetches BTC & ETH prices and 24h % change.
- Code Node (“Dip Check”) — compares changes against your dip threshold.
- IF Node — continues only if dip condition is true.
- Notification Node — sends alert via Telegram, Slack, or SMS (Twilio).
Example Output:
Dip Alert — BTC –3.2%, ETH –2.8%
Not financial advice.
🛠 Setup Guide
1) Dip threshold
- Open the Code node.
- Change the line:
const DIP = -2.5; // trigger if 24h drop <= -2.5%
Set your preferred dip value (e.g., –5 for a 5% drop). 2) Choose your alert channel Telegram: add your bot token & chat ID. Slack: connect Slack API & set channel name. Twilio: configure SID, token, from/to numbers. 3) Test Temporarily set DIP to 0 to force an alert. Run once from the Code node → confirm alert message text. Execute the Notification node → confirm delivery to your channel. 🎛 Customization Cadence: change Schedule Trigger (every 5m, 15m, hourly, etc.). Coins: extend the CoinGecko call (add solana, bnb) and update Code node logic. Multiple alerts: duplicate IF → Notification branch for different thresholds (minor vs major dip). Combine with “Threshold Alerts” workflow to cover both upside breakouts and downside dips. Storage: log alerts into Google Sheets for tracking dip history. 🧩 Troubleshooting No alerts firing: check CoinGecko API response in Execution Data. Wrong %: CoinGecko returns usd_24h_change directly — no math needed. Duplicate alerts: add a debounce using a Sheet/DB to store last fired time. Telegram not posting: confirm bot has access to your channel/group.
Cryptocurrency Dip Alerts for Bitcoin & Ethereum via Telegram, Slack & SMS
This n8n workflow monitors the price of Bitcoin (BTC) and Ethereum (ETH) against a predefined threshold and sends alerts via Telegram, Slack, or SMS (Twilio) when a significant price dip is detected. This helps you stay informed about market movements without constant manual checking.
What it does
- Schedules Checks: The workflow runs on a predefined schedule (e.g., every 5 minutes).
- Fetches Cryptocurrency Prices: It makes an API request to a cryptocurrency exchange to get the current prices of Bitcoin (BTC) and Ethereum (ETH).
- Calculates Price Change: It uses a Code node to calculate the percentage price change for both BTC and ETH compared to a previously stored reference price.
- Checks for Dips: An If node checks if either BTC or ETH has dropped by a specified percentage (e.g., 5%).
- Sends Alerts: If a dip is detected, it sends a customizable alert message to your chosen communication channels:
- Telegram: Sends a message to a specified Telegram chat.
- Slack: Posts a message to a designated Slack channel.
- Twilio (SMS): Sends an SMS message to a configured phone number.
- Updates Reference Price: After each check, the workflow updates the stored reference price for the next comparison.
Prerequisites/Requirements
- n8n Instance: A running n8n instance.
- Cryptocurrency Exchange API: Access to a cryptocurrency exchange API (e.g., CoinGecko, Binance, Coinbase) to fetch price data. The current workflow uses a generic HTTP Request, so you'll need to configure the specific API endpoint.
- Telegram Account & Bot: If using Telegram, you'll need a Telegram Bot token and the chat ID where you want to receive alerts.
- Slack Account: If using Slack, you'll need a Slack workspace and a way to send messages (e.g., a Slack App with incoming webhooks or a bot token).
- Twilio Account: If using Twilio for SMS, you'll need a Twilio Account SID, Auth Token, and a Twilio phone number.
Setup/Usage
- Import the Workflow:
- Download the provided JSON file.
- In your n8n instance, go to "Workflows" and click "New".
- Click the "Import from JSON" button and paste the workflow JSON or upload the file.
- Configure Credentials:
- Telegram: Create a Telegram credential and enter your Bot Token.
- Slack: Create a Slack credential (e.g., OAuth2 or Access Token) and configure it for your workspace.
- Twilio: Create a Twilio credential and enter your Account SID and Auth Token.
- Customize Nodes:
- Schedule Trigger (Node 839): Adjust the interval at which the workflow runs (e.g., every 5 minutes, every hour).
- HTTP Request (Node 19):
- Update the URL to your chosen cryptocurrency API endpoint (e.g.,
https://api.coingecko.com/api/v3/simple/price?ids=bitcoin,ethereum&vs_currencies=usd). - Configure any necessary authentication headers or query parameters for your API.
- Update the URL to your chosen cryptocurrency API endpoint (e.g.,
- Code (Node 834): This node contains the logic for calculating price changes and determining dips. You'll need to adjust the
dipThresholdvariable (e.g.,-0.05for a 5% dip) and potentially the logic for extracting prices from your API response. This node also handles storing and retrieving thelastPrice(you might need to implement a persistent storage solution if you want to maintainlastPriceacross n8n restarts, otherwise it will reset). - If (Node 20): This node checks the
dipDetectedflag from the Code node. No direct changes are usually needed here unless you modify the Code node's output. - Telegram (Node 49):
- Select your Telegram credential.
- Enter the
Chat IDwhere you want to receive messages. - Customize the
Textmessage for the alert.
- Slack (Node 40):
- Select your Slack credential.
- Specify the
Channelwhere the message should be posted. - Customize the
Textmessage for the alert.
- Twilio (Node 45):
- Select your Twilio credential.
- Enter your
From(Twilio) andTo(recipient) phone numbers. - Customize the
Bodyof the SMS message.
- Activate the Workflow: Once configured, activate the workflow to start monitoring cryptocurrency prices.
The "Sticky Note" (Node 565) serves as a general comment area for the workflow.
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