BTC Price Alert → Telegram

Context & Problem

No spam alerts

Price tracking often becomes noisy: bots send the same alert repeatedly every time the workflow runs, even if nothing important changed.

Solution: track BTC price on a schedule and send a Telegram message only when the price crosses a defined threshold and the state changes (normal → above / normal → below). Uses persisted state to prevent duplicates.

Goal: Monitor BTC via CoinGecko and alert only on meaningful state changes, not on every run.

Implementation

Nodes & logic

Schedule (15m): runs every 15 minutes (Europe/Prague)
Set Thresholds: currency + upper_threshold + lower_threshold
HTTP Request: fetch BTC price from CoinGecko
Code: determine state (above/below/normal), compare with prev_state, set should_alert, build message
IF (state changed): pass only when should_alert == true
Send Telegram: deliver formatted alert message

Schedule → Set Thresholds → HTTP Request → Code → IF → Telegram — Fig 1. Workflow structure in n8n

HTTP Response Example (CoinGecko)

{ "bitcoin": { "usd": 68823 } }

Set Thresholds config — Fig 2. Threshold configuration

Code node - determine state & anti-spam — Fig 3. Core anti-spam logic in Code node

Pseudo-Logic (State Machine)

state =
  price >= upper_threshold ? "above" :
  price <= lower_threshold ? "below" :
  "normal"

should_alert =
  state !== prev_state
  AND state !== "normal"

if should_alert:
  send message
  save prev_state = state

Telegram alert message example — Fig 4. Example Telegram alert message

Example Telegram Message

🚀 BTC above threshold!
Price: 68,823 USD
Threshold: 68,000 USD
Time: 2026-02-13 21:15:52

Results & Impact

Why it matters

Quantitative

Checks every 15 minutes automatically
0 duplicate alerts (state-based)
Near real-time monitoring

Qualitative

Noise-free notifications
Clear message formatting
Easy threshold tuning

Business Use Cases

Crypto risk monitoring
Portfolio alerting
Automated trading signals

Export Workflow

Download the n8n workflow JSON export and import it directly into your n8n instance.