What is Pine Script? How to Code Pine Script on TradingView

Last updated: 02/01/2026

Have you ever found a great indicator on TradingView but wanted to modify it to suit your needs? Or do you have a unique strategy idea but don’t know how to backtest it?

That’s when you need to learn Pine Script.

At WeMasterTrade, we believe that the gap between an amateur trader and a professional trader lies in the ability to “master the tool.” Instead of relying on what others have created, professional traders create their own edge.

This article will decode what Pine Script is and guide you through the first steps on how to code Pine Script to write your own trading “weapon.”

1. What is Pine Script?

Pine Script is a specialized programming language developed by TradingView. It was designed to be lightweight, simple, and to run directly on the TradingView cloud servers.

Unlike MQL4 or MQL5 used in MetaTrader (which are based on the relatively complex C++), Pine Script is optimized for traders who are not IT professionals. You can write a custom RSI indicator in just 3 to 5 lines of code—a task that might require a full page of code in MT4.

Why Should Traders Learn How to Code Pine Script?

  1. Easy to Learn: The syntax is highly readable and resembles plain English.

  2. Massive Data Access: Access historical and real-time data for thousands of pairs, stocks, and crypto assets directly within your script.

  3. High-Speed Backtesting: Test your strategies in seconds using TradingView’s powerful server-side processing.

  4. Custom Alerts: Program your own logic to send notifications to your phone or email whenever a specific signal occurs.

2. Pine Editor Interface: The starting point for every coder

To begin learning how to code Pine Script, you don’t need to install any heavy software. Everything happens right in your web browser.

  1. Open a TradingView chart.

  2. Look at the bottom of the screen and locate the Pine Editor tab.

  3. Click Open → New blank indicator.

This is your Integrated Development Environment (IDE). Once you finish writing your script, simply click “Add to Chart,” and your code will execute immediately.

3. The Basic Structure of a Pine Script Code

A standard script (using the latest Version 5) typically consists of three main parts.

Part 1: Declaration

Informs the system whether this is an indicator (drawn over or below the chart) or a strategy (for backtesting).

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//@version=5

indicator(“My First Script”, overlay=true)

 

  • overlay=true: Draws over the candlestick (similar to MA, Bollinger Bands).
  • overlay=false: Draws in a separate window below (similar to RSI, MACD).

Part 2: Inputs

Allows users to edit parameters in the Settings section without modifying the code.

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len = input.int(14, “RSI Length”)

src = input.source(close, “Price Source”)

 

Part 3: Calculation & Plotting

Uses built-in functions (ta – technical analysis) for calculations and the plot command for plotting.
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myRSI = ta.rsi(src, len)
plot(myRSI, “RSI Line”, color=color.blue)
4. How to Code Pine Script: A Practical “Hello World” Example

Let’s practice writing a simple indicator: two MA lines crossing and changing background color. This is a beginner’s exercise for anyone who wants to learn how to code Pine Script.

Copy the following code and paste it into Pine Editor:

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//@version=5

indicator(“WMT – Simple MA Cross”, overlay=true)

 

// 1. Create input fields to adjust the MA period

fastLen = input.int(20, title=”Fast MA”)

slowLen = input.int(50, title=”Slow MA”)

 

// 2. Calculate the MA value

// ta.sma is the built-in Simple Moving Average function

fastMA = ta.sma(close, fastLen)

slowMA = ta.sma(close, slowLen)

 

// 3. Draw two MA lines on the plot

plot(fastMA, color=color.green, title=”Fast MA”)

plot(slowMA, color=color.red, title=”Slow MA”)

 

// 4. Logic to change background color when crossing ( Buy/Sell Signal)

// ta.crossover: Cross upwards | ta.crossunder: Cross downwards

longSignal = ta.crossover(fastMA, slowMA)

shortSignal = ta.crossunder(fastMA, slowMA)

 

// Color background green when Buying, red when Selling (90% opacity)

bgcolor(longSignal ? color.new(color.green, 90) : na)

bgcolor(shortSignal ? color.new(color.red, 90) : na)

 

Explanation:

  • When the 20-day moving average (MA 20) crosses above the 50-day moving average (MA 50), the chart will flash green (Buy signal).
  • When the 20-day moving average (MA 20) crosses below the 50-day moving average (MA 50), the chart will flash red (Sell signal).

Click “Save” and “Add to chart” to see your result!

5. From Pine Script Code to Trading at WeMasterTrade

There’s a fact you need to know: Pine Script is only for analysis; it cannot be used to directly place orders on regular Forex platforms.

Trading platforms and funding organizations (like WeMasterTrade) usually use the MetaTrader 5 (MT5) platform. So, what’s the point of learning Pine Script?

  1. Brainstorming: Use TradingView to find ideas and backtest them super fast to see if they’re profitable.
  2. Alerts: Pine Script code sends TradingView notifications to your phone when there’s a trade.
  3. Execution: When you receive an alert, open WeMasterTrade’s MT5 and place the order.

For Developers: If you want 100% automation from TradingView to MT5, you’ll need to use Webhook technology (API connection) or hire a coder to convert the source code from Pine Script to MQL5.

Understanding Pine Script opens up a whole new horizon in technical analysis. You’re no longer limited by available tools, but can realize even your wildest ideas.

And once you’re confident with your own trading system (thoroughly backtested on TradingView), don’t let it sit idle.

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