Convert Pine Script to MQL5 or MQL4
You built it in TradingView and now need it on MetaTrader: to automate it, to test it on tick data, or because your broker or prop firm uses MT4/MT5. I rebuild the logic in MQL5 or MQL4, then compare values and trades against TradingView so you can see the conversion is faithful.
Mutual NDA before you share your strategy · reply within one working day
| Pine Script | MQL5 |
|---|---|
| ta.ema(close, 21) | iMA(_Symbol, _Period, 21, 0, MODE_EMA, PRICE_CLOSE) + CopyBuffer() |
| ta.crossover(a, b) | a[1] > b[1] && a[2] <= b[2] (closed bars) |
| request.security(…, "240", …) | Indicator handle on PERIOD_H4, read from the last closed bar |
| strategy.entry("L", strategy.long) | CTrade.Buy(lots, _Symbol, 0, sl, tp) |
| strategy.exit(…, stop, limit) | SL/TP on the position, or managed exits |
| var float level = na | Saved state, rebuilt after a restart |
| barstate.isconfirmed | IsNewBar() on the chart timeframe |
- Starting price
- $200
- Typical delivery
- 4–10 days
- Revisions
- 2 revision rounds
- Handover
- Source + reconciliation report
Why a line-by-line port rarely matches.
- 01
Bar indexing
Pine counts back from the current bar. MQL arrays can run in either direction. One off-by-one error moves every signal by a bar.
- 02
Order execution
Pine strategies fill at the next bar’s open by default and ignore spread unless told otherwise. An EA trades at the live bid and ask.
- 03
Data feeds
TradingView’s prices, session times and daily candles often differ from your broker’s, so signals near a threshold can disagree.
- 04
Warm-up and initial values
Indicators start differently on each platform, so the first bars of an average or oscillator can disagree until they settle.
- 05
Higher-timeframe data
request.security() with the wrong lookahead can show values that were not known yet. Converted naively, the EA inherits the problem or loses the edge.
From your script to a verified EA or indicator.
- 01
Send the Pine source
Paste the script or share it privately, with the symbol and timeframe you use and any settings you changed.
- 02
Review and fixed quote
I list the platform differences that affect your script, flag anything that cannot be reproduced on MT5, and quote a fixed price.
- 03
Rebuild in MQL
The logic is rewritten for MetaTrader, not translated word for word, with sizing and risk inputs added if it is a strategy.
- 04
Reconcile
Indicator values and trades are compared against TradingView on the same data. Every remaining difference is explained in the report.
- 05
Deliver
MQL source, compiled file, the reconciliation report and notes on running it live.
Common questions
Will the MT5 backtest match TradingView exactly?
Signals should match on the same data. Totals usually differ a little, because the data feed, spread and fill rules differ between platforms. The reconciliation report shows each difference and its cause, so nothing is a surprise.
Can you convert an indicator as well as a strategy?
Yes. An indicator becomes an MT4/MT5 indicator with buffers an EA can read later. A strategy becomes an Expert Advisor with proper position sizing and risk limits.
MQL4 or MQL5?
MQL5 unless your broker or prop firm only offers MT4. MT5’s tick-data Strategy Tester makes the converted strategy much easier to verify.
Which Pine versions do you convert?
Versions 3 to 6. Older scripts are often worth a quick clean-up first, which I include where it helps.
What does it cost?
Conversions start $200 for a single indicator or a simple strategy. Multi-timeframe strategies and scripts with many inputs cost more. You get a fixed quote after I have read the script.
Tell me the strategy. I’ll tell you what it takes.
Fifteen minutes, no pitch. Mutual NDA before you describe anything you care about. You get an honest view of feasibility, timeline and price, even if the answer is “don’t build this”.