Convert a Pine Script (TradingView) to ProBuilder with AI

Thousands of indicators and strategies are published for TradingView in Pine Script. Sooner or later every ProRealTime user finds one they would like to run on their own platform, and the question is always the same: how do I convert this Pine Script to ProBuilder?

This tutorial explains what a conversion involves, gives you the function equivalents you will need most often, shows why the usual “Pine Script AI generator” or a general chatbot produces ProBuilder that does not compile, and walks through a conversion done with ProRealAI, the AI assistant built by ProRealCode for ProRealTime.

Pine Script and ProBuilder: same ideas, different languages

Both languages are built for the same job: run a calculation bar by bar on a price series and draw the result or place orders. That is good news, because the logic of a Pine Script indicator nearly always translates. What differs is the syntax, the built-in library and a few platform concepts.

The table covers most of what you will meet. The rest is where conversions go wrong.

The five things that do not map one-to-one

1. Persistent variables. In Pine Script you write var x = 0 to keep a value from one bar to the next. In ProBuilder every variable already keeps its value across bars, so var simply disappears, but a variable that Pine re-initialises on every bar must be explicitly reset in ProBuilder.
2. Multiple plots. Pine allows any number of plot() calls scattered through the script. ProBuilder has a single RETURN line, at the end, that lists every output: RETURN a AS "A", b AS "B".
3. Inputs. There is no input() keyword. You declare a plain variable and, once the indicator is saved, mark it as a parameter in the code editor so it appears in the settings window.
4. Higher timeframes. request.security() becomes a TIMEFRAME() block, and the code must switch back with TIMEFRAME(default) before the RETURN. Look-ahead is avoided with updateonclose.
5. Strategy orders. Pine’s strategy.entry, strategy.exit and pyramiding settings become ProOrder’s BUY, SELL, SELLSHORT, EXITSHORT and DEFPARAM CumulateOrders. Position tracking uses LongOnMarket, ShortOnMarket and OnMarket.

Then there are the things ProBuilder does not have at all: tables, labels with free positioning, alerts as Pine defines them, arrays with the full Pine API, and access to other symbols’ data inside one indicator. A good conversion tells you when a feature has no equivalent instead of inventing one.

Why ChatGPT and “Pine Script AI generators” fail at this

Search for “Pine Script AI generator” or “ChatGPT Pine Script” and you will find dozens of tools. They are reasonably good at writing Pine Script, because Pine Script is everywhere on the web. Ask the same tools for ProBuilder and the quality collapses, for three reasons:

• They have barely seen ProBuilder. The language is small and its documentation is scattered. The model has read a million Pine scripts and a few hundred ProBuilder ones, so it fills the gaps with Pine.
• They invent functions. ta.ema becomes ema(close, 20), strategy.entry becomes buy("Long"), plot stays plot. None of these exist in ProBuilder. ProRealTime refuses the code on the first line.
• They cannot check. A general assistant has no way to verify whether AverageTrueRange takes [14] or (14), or whether the parameter goes before or after. It guesses, and it guesses with confidence.

The typical experience is a chain of “Error line 3”, each fix introducing a new invented function, until you give up and post on the forum.

Converting with ProRealAI

ProRealAI was designed by the ProRealCode team for exactly this kind of task. It knows both languages, but the key difference is that every function, reserved word and parameter in the ProBuilder it produces is checked against the official ProRealTime documentation before the code is shown. It also searches the ProRealCode library and forum in real time, so if the community has already converted the same indicator, it finds it.

Step 1: paste the Pine Script

Open ProRealAI (you only need a free ProRealCode account, and you start with 150 free credits every 30 days), start a new conversation and paste the whole script, with a one-line request:

Convert this Pine Script indicator to ProBuilder for ProRealTime.

Take this Pine Script as an example:

//@version=5
indicator("EMA Cross", overlay=true)
fast = input.int(20, "Fast EMA")
slow = input.int(50, "Slow EMA")
emaFast = ta.ema(close, fast)
emaSlow = ta.ema(close, slow)
plot(emaFast, color=color.green)
plot(emaSlow, color=color.red)
plotshape(ta.crossover(emaFast, emaSlow), style=shape.triangleup, location=location.belowbar)

Step 2: read the translation

ProRealAI returns the ProBuilder equivalent, with the destination named (here: Indicator) and a Copy button:

// EMA cross, translated from Pine Script
fast = 20
slow = 50
emaFast = ExponentialAverage[fast](close)
emaSlow = ExponentialAverage[slow](close)
IF emaFast CROSSES OVER emaSlow THEN
  DRAWARROWUP(BarIndex, low - AverageTrueRange[14](close)) COLOURED(0,150,0)
ENDIF
RETURN emaFast COLOURED(0,150,0) AS "Fast EMA", emaSlow COLOURED(200,0,0) AS "Slow EMA"

Notice what happened: the two input.int became plain variables you can expose as settings, the two plot() calls were merged into one RETURN, and the plotshape below the bar became a DRAWARROWUP placed one ATR under the low, because ProBuilder has no “below bar” location. That last choice is explained in the answer, and you can ask for a different one.

Step 3: handle the parts that need a decision

When the Pine Script uses something with no direct equivalent, ProRealAI says so and proposes the closest ProBuilder construction. For example, request.security() on the daily timeframe becomes:

// Daily EMA 200 read from an intraday chart (Pine: request.security)
TIMEFRAME(daily, updateonclose)
dailyEma = ExponentialAverage[200](close)

TIMEFRAME(default)
RETURN dailyEma AS "Daily EMA 200"

If the script uses tables, labels or arrays the platform cannot reproduce, the assistant tells you rather than making up a function, and suggests what can be drawn with DRAWTEXT, DRAWSEGMENT or DRAWRECTANGLE instead.

Step 4: convert a strategy

Pine strategies become ProOrder systems. Here is the same EMA cross as a long-only strategy with an ATR stop:

// Pine Script strategy translated to ProOrder
DEFPARAM CumulateOrders = false

fast = 20
slow = 50
atrPeriod = 14
atrMult = 2

emaFast = ExponentialAverage[fast](close)
emaSlow = ExponentialAverage[slow](close)
atr = AverageTrueRange[atrPeriod](close)

IF NOT LongOnMarket AND emaFast CROSSES OVER emaSlow THEN
  BUY 1 CONTRACT AT MARKET
ENDIF

IF LongOnMarket AND emaFast CROSSES UNDER emaSlow THEN
  SELL AT MARKET
ENDIF

SET STOP LOSS atrMult * atr

Paste it in ProBacktest (Backtesting → Create a trading system → Paste → Run) and you can compare the results with the TradingView strategy tester. Differences are normal: fill logic, spread and commission settings differ between platforms, and ProRealAI can explain each one if you ask.

Step 5: iterate

The conversation keeps its context, so you can refine: “add a short side”, “use a trailing stop instead”, “why does the ProRealTime backtest show fewer trades than TradingView?”. Paste any compile error with ProRealTime’s exact message and you get the corrected code.

Checklist before you trust the converted code

• Compare a few bars visually: same EMA values, same crossover bars on both platforms.
• Check the default parameters match the original script’s inputs.
• For strategies, check DEFPARAM CumulateOrders against Pine’s pyramiding setting.
• Look for repainting: any TIMEFRAME block should use updateonclose unless you want intra-bar updates.
• Backtest before any live use. A translation reproduces the idea, not the author’s results.

Frequently asked questions

Can I convert in the other direction, ProBuilder to Pine Script?

ProRealAI does not offer that direction. It is built to produce ProBuilder, ProOrder and ProScreener code for ProRealTime.

Does it work with Pine Script v4 and v6?

Yes. The version only changes the Pine syntax; the assistant reads it and produces ProBuilder for the current ProRealTime version.

What does a conversion cost?

ProRealAI uses credits, not a subscription. A typical exchange costs about 9 credits; a long script may cost more because the answer is longer. The 150 free credits every 30 days are enough for several conversions. Details on the ProRealAI guide page.

Is the converted code guaranteed?

The syntax is verified against the official documentation before it is displayed, so it compiles. The logic must still be reviewed and backtested by you, as with any AI-generated code.

Which languages?

The interface is available in English, French, German, Spanish, Italian, Swedish and Dutch, and the assistant answers in the language of your question.

Where do I ask for help with a conversion?

In the ProRealAI group on the forum, where support and question topics about the assistant are gathered. Post the Pine Script, what ProRealAI returned and what does not match, and the team and other users will help.

Try it on your own script

Sign in with your ProRealCode account, open ai.prorealcode.com, paste your Pine Script and ask for the ProBuilder version. The first 150 credits are free, no card required. Questions and feedback are welcome in the ProRealAI group.

Also available in French, German, Spanish, Italian, Swedish and Dutch.