How to Create Buy/Sell Signals Using Pine Script (Simple Guide for Traders)

If you're using TradingView and want to build your own Buy/Sell indicator, then Pine Script is your best friend. Many beginners think coding is difficult — but with Pine Script, you can create powerful signals in just a few lines.

In this blog, I’ll explain how to create Buy/Sell signals using Pine Script, step-by-step, in a way that's simple and practical — like I use it myself.

📌 What is Pine Script?

Pine Script is the programming language used on TradingView to create custom indicators, alerts, and strategies. It lets you automate signals, test strategies, and build your edge.

Even if you're not a developer, you can still use Pine Script for:

• Creating Buy/Sell signals

• Backtesting strategies

• Building custom indicators like RSI, EMA crossover, SMC, etc.

⚙️ :Basic Structure of Pine Script

Every Pine Script has a few basic components:

    //@version=5

    indicator("My Buy/Sell Script",overlay=true)

• @version=5: Latest version of Pine Script

• indicator(..): Defines the indicator and whether it overlays on chart or not

✅ Simple Buy/Sell Signal Example (EMA Crossover)

Let’s say you want a Buy signal when EMA 9 crosses above EMA 21, and a Sell signal when it crosses below. Here's how:

This basic script uses a 9 EMA and 21 EMA crossover to generate Buy/Sell signals:

//@version=5

indicator("EMA Crossover Buy/Sell", overlay=true)

fastEMA = ta.ema(close, 9)

slowEMA = ta.ema(close, 21)

buySignal = ta.crossover(fastEMA, slowEMA)

sellSignal = ta.crossunder(fastEMA, slowEMA)

plot(fastEMA, color=color.orange)

plot(slowEMA, color=color.blue)

plotshape(buySignal, location=location.belowbar, color=color.green, style=shape.labelup, text="BUY")

plotshape(sellSignal, location=location.abovebar, color=color.red, style=shape.labeldown, text="SELL")

ta.ema:Calculates the Exponential Moving Average
ta.crossover:Detects when one line crosses above another
plotshape:Plots Buy/Sell labels on the chart

🔍 What This Script Does:

• Calculates 9 EMA and 21 EMA

• Detects crossover for BUY, and crossunder for SELL

• Displays green “BUY” and red “SELL” labels directly on the chart

📊 How to Add This Script on TradingView

1. Open TradingView

2. Go to Pine Editor (bottom panel)

3. Paste the script

4. Click Add to Chart

5. You’ll now see Buy/Sell signals live on any instrument

🚀 Make It Better with Alerts

You can also create alerts using this script:

Simple EMA Crossover with Alerts

This Pine Script adds alerts to the traditional EMA crossover strategy:

//@version=5

indicator("EMA Crossover with Alerts", overlay=true)

fastEMA = ta.ema(close, 9)

slowEMA = ta.ema(close, 21)

buySignal = ta.crossover(fastEMA, slowEMA)

sellSignal = ta.crossunder(fastEMA, slowEMA)

plot(fastEMA, color=color.orange)

plot(slowEMA, color=color.blue)

plotshape(buySignal, location=location.belowbar, color=color.green, style=shape.labelup, text="BUY")

plotshape(sellSignal, location=location.abovebar, color=color.red, style=shape.labeldown, text="SELL")

alertcondition(buySignal, title="Buy Alert", message="📈 Buy Signal: EMA 9 crossed above EMA 21")

alertcondition(sellSignal, title="Sell Alert", message="📉 Sell Signal: EMA 9 crossed below EMA 21")

ta.crossover(): Detects Buy crossover
alertcondition(): Triggers TradingView alerts
message=Custom notification text

This way, you’ll get notified instantly when a signal appears — via mobile, email, or pop-up.

⚠️ Things to Keep in Mind

Use clear and simple code when writing Pine Script.
Always backtest your strategy before going live.
Add alerts to make automation easier.
Don’t rely on one indicator—combine with price action.
Keep refining your script based on market changes.

💡 Pro Tip:

You can combine Pine Script with your own strategy (like RSI + EMA, SMC, or Order Block logic). Pine Script is flexible and powerful once you get comfortable with the basics.

📝 Final Thoughts

Creating Buy/Sell signals with Pine Script is not as hard as it seems. With just a few lines of code, you can build your own indicators, automate signals, and take full control of your trading system.

Whether you're an intraday trader or swing trader — learning Pine Script gives you an edge most traders don’t have.