Pine Script is TradingView's proprietary scripting language used to create custom indicators, strategies, and alerts. It runs server-side on TradingView's infrastructure and supports real-time market data, technical analysis functions, and webhook integrations for automation.

Do Pine Script alerts work with free TradingView accounts?

Free TradingView accounts can use Pine Script alerts but with limitations: only one active alert at a time, no webhook URLs, and basic notification channels. Webhook delivery to Telegram, Discord, or trade automation services requires TradingView Pro+ ($30/month) or higher.

How do I prevent Pine Script alerts from repainting?

To prevent repainting alerts, only fire alert() calls on confirmed bars using barstate.isconfirmed or by checking close[0] values. Avoid using lookahead.on parameter in security() calls. Set alert frequency to alert.freq_once_per_bar_close instead of alert.freq_once_per_bar to ensure alerts fire only after candle close.

Pine Script Trading Alerts: Complete 2026 Guide for TradingView

Q: What's the difference between alert() and alertcondition()?

alert() is a Pine Script v4+ function that fires alerts dynamically with custom messages built from real-time variables like entry price, stop loss, and take profit. alertcondition() is the legacy method using static text strings defined at script load. Use alert() for dynamic content, alertcondition() for simple boolean triggers.

Q: Can Pine Script alerts execute trades automatically?

Pine Script cannot execute trades directly, but it can output webhook JSON that relay services like PineConnector or TradersPost convert into broker orders. The alert fires from TradingView, the relay service receives the webhook, and the relay service places the order at your broker via API.

Pine Script trading alerts are notifications triggered by custom logic in TradingView indicators or strategies. Pine Script – TradingView's proprietary scripting language – provides two alert mechanisms: the modern alert() function for dynamic messages with real-time data, and the legacy alertcondition() for static boolean triggers. Combined with TradingView's webhook system, Pine Script alerts can deliver entry, stop loss, and take profit data to Telegram, Discord, email, SMS, or trade automation services.

This guide covers the alert() function syntax, repaint prevention, webhook integration, and best practices used in production trading systems like Gold Scalpers.

The Two Pine Script Alert Functions

Function	Pine Script Version	Best For
`alert()`	v4 and later	Dynamic messages with real-time variables
`alertcondition()`	v3 and later (legacy)	Static text alerts, simple boolean triggers

The alert() Function: Modern Approach

The alert() function fires when conditions are met during script execution and accepts dynamically-built messages:

//@version=6
indicator("Custom Alert Example", overlay=true)
rsi = ta.rsi(close, 14)
if rsi < 30
    msg = "BUY @ " + str.tostring(close) + " | RSI: " + str.tostring(rsi)
    alert(msg, alert.freq_once_per_bar_close)

Key parameters:

message: any string – typically built from real-time variables
frequency: alert.freq_once_per_bar, alert.freq_once_per_bar_close, or alert.freq_all

How to Avoid Repainting Alerts

Repainting occurs when an alert fires intrabar and the signal disappears after the candle closes. To prevent this:

Use alert.freq_once_per_bar_close instead of alert.freq_once_per_bar
Only check signal conditions on confirmed bars: wrap your alert logic in if barstate.isconfirmed
Avoid lookahead.on in request.security() calls
Test by examining bar history vs real-time behavior – they should match exactly

Webhook Integration for Pine Script Alerts

To deliver Pine Script alerts to external services (Telegram, Discord, brokers), use TradingView's webhook system:

Build your alert message as JSON or HTML in Pine Script
Click ⏰ → Create Alert in TradingView
Set Condition to "Any alert() function call"
Enable Notifications → Webhook URL
Paste your endpoint URL (e.g., Telegram bot API or PineConnector relay)

Pine Script Alert Limitations by Plan

TradingView Plan	Active Alerts	Webhooks	Cost/month
Free / Basic	1	❌ No	$0
Essential	20	❌ No	$15
Plus	100	❌ No	$30
Premium	400	✅ Yes	$60
Pro+	800	✅ Yes	$30 (annual billing)

Note: Pricing accurate as of May 2026. Webhooks require Pro+ or higher.

Common Alert Patterns

Pattern 1: Single condition trigger

if ta.crossover(close, ema)
    alert("Crossover: " + str.tostring(close), alert.freq_once_per_bar_close)

Pattern 2: Multi-filter signal (used by Gold Scalpers)

signal = isOversold and isVolumeSpike and isRangeFilter and twoGreens
if signal
    msg = '{"action":"buy","entry":' + str.tostring(close) +
          ',"sl":' + str.tostring(slPrice) +
          ',"tp":' + str.tostring(tpPrice) + '}'
    alert(msg, alert.freq_once_per_bar_close)

Pattern 3: Alert with HTML formatting (for Telegram)

msg = "🎯 BUY SIGNAL\n📍 Entry: " + str.tostring(close) + ""
alert(msg, alert.freq_once_per_bar_close)

Frequently Asked Questions

What is Pine Script?

Pine Script is TradingView's proprietary scripting language for creating custom indicators, strategies, and alerts. It runs on TradingView servers and supports real-time market data and technical analysis functions.

What's the difference between alert() and alertcondition()?

alert() fires alerts with dynamic messages built from real-time variables. alertcondition() uses static text defined at script load. Use alert() for entry/SL/TP messages, alertcondition() for simple boolean triggers.

Do alerts work on free TradingView accounts?

Yes, but limited to 1 active alert with no webhook URL support. Webhooks require Pro+ ($30/month).

Can Pine Script alerts execute trades automatically?

Not directly. Pine Script outputs webhook JSON that relay services (PineConnector, TradersPost) convert into broker orders.

How do I prevent repainting alerts?

Use alert.freq_once_per_bar_close, wrap logic in if barstate.isconfirmed, avoid lookahead.on.