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TradingView Custom Screener Pine Script: A Guide to Building Your Own Market Scanner

· 3 min read
Pineify Team
Pineify Team

In the fast-paced world of trading, having a reliable tool to quickly identify promising trading opportunities is essential. TradingView's Pine Script allows traders to create custom screeners that scan multiple assets based on personalized criteria, offering a powerful edge beyond standard built-in screeners.

What Is a TradingView Custom Screener in Pine Script?​

A custom screener in TradingView is a Pine Script program designed to filter a list of symbols (stocks, crypto, forex, etc.) according to user-defined technical conditions. Unlike the default TradingView screener, which has limited filtering options and predefined indicators, a Pine Script screener lets you tailor the logic to your exact trading strategy, combining multiple indicators or conditions as needed.

The Best Pine Script Generator

Why Use a Custom Screener?​

  • Personalized Filtering: Define any condition, such as RSI overbought levels, moving average crossovers, or complex multi-indicator signals.
  • Efficient Market Scanning: Quickly scan up to 40 symbols (Pine Script's limit on security calls) in one script to find assets that meet your criteria.
  • Alerts Integration: Receive alerts when conditions are met, even forwarding them to platforms like Telegram for instant notifications.
  • Prioritized Watchlists: Organize and rank symbols based on indicator values, helping focus on the most promising trades.

How to Create a Basic Custom Screener in Pine Script​

  1. Define Your Screener Function: This function calculates indicator values and returns a boolean condition indicating whether the symbol passes the filter. For example, screening for RSI above 70:
screenerFunc() =>
    rsiValue = ta.rsi(close, 14)
    condition = rsiValue > 70
    [rsiValue, condition]
  1. Apply to Multiple Symbols: Use request.security() to fetch data for each symbol in your watchlist, applying the screener function.
  2. Display Results: Show symbols that meet conditions on the chart or in a panel.
  3. Set Alerts: Create alerts using the strategy alert placeholders like {{strategy.order.alert_message}} to get notified when a symbol triggers your screener.

Limitations to Keep in Mind​

  • Pine Script limits the number of symbols scanned to 40 per script.
  • Screeners run on the chart's timeframe and update at bar close.
  • Alerts can notify triggered symbols but attaching a full list of triggered tickers in one alert is complex and may require additional scripts to decode.
  • The built-in TradingView screener cannot directly incorporate custom Pine Script indicators; custom screeners are a workaround to this limitation.

Tips for Effective Screener Development​

  • Start simple with one or two conditions, then gradually add complexity.
  • Use functions to modularize your screening logic.
  • Test your screener on different timeframes and symbol sets.
  • Leverage alerts to automate your monitoring process.
  • Consider integrating with messaging apps like Telegram for real-time updates.