771 posts tagged with "Pine Script"

You know that sinking feeling when you're working on your Pine Script indicator, everything seems perfect, and then suddenly this error message slaps you in the face: "undeclared identifier."

Trust me, I've been there more times than I'd like to admit. Whether you're just starting with Pine Script or you've been coding for months, this error has probably made you want to throw your computer out the window at least once.

The good news? This error is actually trying to help you. Pine Script is essentially saying, "Hey, you're trying to use something that doesn't exist yet." It's like asking someone to grab your keys when you haven't told them where you put them.

Let me walk you through the five most common reasons this happens and how to fix each one quickly.

The 5 Main Culprits Behind Undeclared Identifier Errors​

1. Using Variables Before You Create Them​

This is the classic beginner mistake (and honestly, I still do it sometimes when I'm coding too fast). You're trying to use a variable that Pine Script has never heard of because you haven't declared it yet.

Think of it like this: imagine walking into a room and asking someone to hand you "the blue box" when there's no blue box in sight. That's what you're doing to Pine Script.

2. Variable Scope Issues (The Hiding Game)​

Here's where things get tricky. If you create a variable inside an if statement or any other block, it's trapped there forever. Pine Script follows something called "scope rules" - basically, variables can only be used in the same area where they were born.

It's like having a conversation in one room, then walking into another room and expecting everyone there to know what you were talking about.

3. Pine Script Version Conflicts​

This one's particularly annoying because it's not really your fault. Pine Script has evolved significantly over the years. What worked perfectly in version 3 might be completely broken in version 5.

Some functions got renamed, others got moved to different namespaces, and new syntax rules were introduced. If you're copying code from an older tutorial or forum post, there's a good chance it's using outdated syntax.

4. Incorrect Function or Built-in Names​

Pine Script has specific names for its built-in functions and variables. Sometimes you might think a function is called one thing when it's actually called something else. Or maybe you're using the old name for something that got updated.

5. Copy-Paste Code from Different Versions​

We've all been there - you find a cool indicator on TradingView's public library or a forum post from 2019, copy it, paste it, and wonder why it doesn't work. The problem is often that the code was written for an older version of Pine Script.

Ever stared at a TradingView chart that looked like a neon explosion? Yeah, I've been there too. When you're running multiple indicators, your chart can quickly turn into a visual nightmare. That's where Pine Script transparent colors come to the rescue – they're like having multiple layers of tracing paper that let you see everything without the chaos.

Ever found yourself with a brilliant trading idea while you're out and about, but no computer in sight? I've been there. You're sitting in a coffee shop, scrolling through market news, and suddenly you want to test that moving average strategy that just popped into your head. Here's the thing though - while TradingView's mobile app is great for watching charts, it doesn't give you access to the Pine Script editor. But don't worry, I've got a workaround that actually works pretty well.

You know that sinking feeling when you're watching a winning trade turn into a loser? You're up 50 points, then 30, then suddenly you're staring at a red number wondering what just happened. That's exactly why trailing take profit exists - it's like having a bodyguard for your profits.

I remember my first few months trading, manually trying to time my exits. I'd either chicken out too early and miss huge moves, or get greedy and watch my gains disappear. Trailing take profit changed everything for me, and I want to show you exactly how to set it up in Pine Script.

Trailing stop losses in Pine Script might just be the game-changer your trading has been missing. After years of watching profitable trades turn into painful losses, I finally figured out how to build proper trailing stops that actually protect my money while letting my winners run.

Here's everything I wish someone had told me when I started implementing trailing stops in my TradingView strategies.

So you've built this killer trading strategy on TradingView that's been working like a charm, but now you want to take it live on MetaTrader 5? I totally get it. Converting Pine Script to MQL5 feels like translating Shakespeare into modern English - technically the same concepts, but a completely different way of expressing them.

Look, I'm not going to sugarcoat this - Pine Script to MQL5 conversion isn't something you knock out over your morning coffee. But here's the thing: once you understand the core differences and follow a systematic approach, it becomes way more manageable than most people think.

Ever spent weeks perfecting a Pine Script strategy on TradingView, only to realize you can't actually trade it automatically? Yeah, I've been there too. You've got this brilliant indicator working like clockwork, showing perfect entry and exit signals, but it's stuck in TradingView land while your broker account sits on MetaTrader 4.

Here's the thing: converting Pine Script to MQL4 isn't some magical one-click process. It's more like rebuilding your house in a completely different country with different building codes. But with the right approach, you can absolutely make it happen.

I'll be honest with you—Pine Script trading bots changed everything for me. After years of staring at charts until my eyes burned and missing trades because I had to sleep (imagine that!), I discovered how to automate my strategies on TradingView.

These aren't just fancy scripts that look cool on your chart. We're talking about real automation that can execute trades while you're having dinner, catch breakouts at 3 AM, and stick to your strategy even when your emotions are screaming to do something stupid.

Ever felt frustrated switching between timeframes just to see how your indicator behaves? I've been there too. After years of manually tweaking code every time I wanted to check a different timeframe, I discovered Pine Script's input.timeframe() function - and it completely changed how I build trading indicators.

You know that feeling when you've built something amazing in Pine Script and suddenly realize you need it to work outside TradingView? I've been there. You've got this brilliant indicator that's making you money, but now you want to use it with a different broker, or maybe you just prefer working in a "real" programming language.

Converting Pine Script to C# isn't exactly a walk in the park, but it's totally doable once you understand what you're dealing with.