Convert Your TradingView (Pine Script) Strategy to an MT5 Expert Advisor

What "convert TradingView strategy to MT5" actually means

You have a strategy that backtests well in TradingView Pine Script, but TradingView can't place live orders on MetaTrader. You want it running as an autonomous MT5 Expert Advisor (EA) — opening and closing trades on your broker account without you watching the chart. That is the job: take the trading logic out of Pine and re-express it in MQL5 so it executes by itself.

The single most important thing to understand up front: this is not a line-by-line translation. Pine and MQL5 are different languages built on different execution models. A "translator" that swaps keywords one-for-one produces an EA that compiles but trades nothing like your backtest. What you actually want is a careful re-implementation of the same logic, validated against your original results. That's what I do, and the rest of this page explains exactly how — and where the honest limits are.

Why it's re-implementation, not translation

Pine Script is a bar-series / vectorized model. When you write ta.ema(close, 21), Pine conceptually evaluates that expression across the whole series, and historical bars are already closed and fixed. Your strategy.entry() calls fire inside that model, and TradingView's backtester fills them on the next bar's open (by default) with its own assumptions.

MQL5 is an imperative, event-driven model. Your code lives inside an OnTick() handler that fires on every incoming price tick. There is no implicit series being recalculated for you — you have to explicitly request indicator handles, copy buffers into arrays, manage state across ticks, and decide yourself whether you act on the forming (live) bar or only on the last closed bar. Order placement goes through OrderSend() / the CTrade class against real broker rules: stops levels, lot steps, margin, fill policy.

So the conversion work is really three things: (1) reproduce each indicator and condition so it computes the same numbers, (2) reproduce the entry/exit/stop/target decisions in an OnTick world, and (3) make those decisions fire at the same moment your backtest assumed they did. Get any of those wrong and the EA drifts from the TradingView results — even though it "works".

Pine concept → MQL5 equivalent

Here's a quick map of how common Pine constructs translate in practice. This is the mental model I work from on every conversion:

Pine Script (TradingView)	MQL5 equivalent	What breaks if done naively
ta.ema(), ta.rsi(), ta.atr()	iMA, iRSI, iATR handles + CopyBuffer()	Off-by-one indexing; reading the live bar instead of the closed one
close[1], high[2] (series history)	iClose(_Symbol,tf,1) / arrays indexed as series	MQL5 array direction (set ArraySetAsSeries) reversed
strategy.entry() / strategy.exit()	trade.Buy() / trade.Sell() + SL/TP, trade.PositionClose()	No position-sizing or pyramiding logic; broker stop-level rejects
request.security(sym, "60", ...)	Separate indicator handle on the higher timeframe	Look-ahead / repaint if HTF bar isn't confirmed
barstate.isconfirmed / closed-bar logic	"new bar" check on time[0] in OnTick	Acting every tick → many extra, early entries
strategy.percent_of_equity sizing	Manual lot calc from equity, tick value, SL distance	Wrong lot size, margin call, prop-firm breach

The #1 requirement: the EA must match the TradingView backtest

Almost every buyer says the same thing: "I want the EA to trade exactly like my TradingView strategy." That is the right goal, and it's the goal I build toward. But I'll be straight with you about what "match" can and cannot mean, because anyone promising a perfect 1:1 replica is either inexperienced or lying.

What I aim for and can deliver: trade-for-trade logic parity. Same entry conditions, same exit conditions, same stop-loss and take-profit rules, same filters, same timeframe handling — so that on the same data the EA takes the same trades in the same direction at the same bar. I validate this by running both side by side on the same symbol and period and comparing the trade list.

What is physically impossible: identical P&L to the last decimal. Here's why, and none of it is a workaround I can engineer away:

• Different data feeds. Your TradingView chart and your MT5 broker pull prices from different sources. The candles aren't byte-identical — different open/close, different gaps, different session times. Same logic on slightly different data = slightly different trades on the edges.
• Spread and slippage. TradingView's strategy tester is optimistic by default; a live MT5 account pays real spread, real commission, and real slippage. Fills move a few points. That alone separates "backtest equity curve" from "live equity curve" — for any system, mine included.
• Repaint / look-ahead in the original. If the Pine strategy itself repaints (more on this below), its backtest is showing trades it could never have taken live. A correct EA won't reproduce those phantom trades — which is a feature, not a bug, even though it makes the numbers differ.

So my deliverable promise is honest: closest-possible logic parity, plus a revision pass where we compare trade lists and I fix any genuine logic divergence I introduced. I do not promise identical profit, and I never promise live profitability — a backtest is a hypothesis, not a track record. If you want to see the kind of broker-side execution work I do behind this, the live automation video gallery and my published work and TradingView scripts are the proof, not screenshots of equity curves.

What actually breaks during a Pine → MT5 conversion

Repaint vs non-repaint

The most common landmine. Many TradingView strategies look brilliant because they secretly use future information — a signal that appears mid-bar and then moves once the bar closes, or a request.security() call without proper confirmation. In the backtest it looks like the strategy entered at the perfect price. Live, that signal disappears. When I convert, I build the EA on closed-bar, non-repainting logic, so it only acts on confirmed data. If your original repaints, I'll tell you, and we decide together whether to faithfully reproduce the (unrealistic) behavior or fix it. If your script has deeper issues, a dedicated Pine Script audit and repair may be the right first step before conversion.

Multi-timeframe (request.security)

Higher-timeframe pulls are a frequent source of mismatch. In MQL5 each timeframe needs its own indicator handle, and I have to make sure the higher-TF bar is confirmed before its value feeds a decision — otherwise the EA fires early and the backtest comparison falls apart.

Series state, arrays, and indexing

Pine hands you history for free with close[1]. In MQL5 I manage arrays explicitly and have to set series direction with ArraySetAsSeries; a single off-by-one here silently shifts every signal by a bar. This is the kind of bug AI-generated conversions ship constantly — they compile, then quietly trade one bar late.

Alerts vs real execution

A TradingView alert just sends a message; an EA places, modifies, and closes real orders. That means position sizing, broker stop-level limits, lot rounding, magic numbers for multi-EA accounts, partial closes, breakeven and trailing logic, and handling of weekend gaps — none of which exist in the Pine version and all of which I build in.

A tiny parity example

A simple "long when fast EMA crosses above slow EMA on the closed bar" looks like this in each language. Note how much explicit plumbing MQL5 needs for the same idea:

// --- Pine Script (v5) ---
fast = ta.ema(close, 9)
slow = ta.ema(close, 21)
if ta.crossover(fast, slow)
    strategy.entry("L", strategy.long)

// --- MQL5 equivalent (closed-bar, non-repainting) ---
int hFast = iMA(_Symbol, _Period, 9, 0, MODE_EMA, PRICE_CLOSE);
int hSlow = iMA(_Symbol, _Period, 21, 0, MODE_EMA, PRICE_CLOSE);

void OnTick() {
   static datetime lastBar = 0;
   datetime t = iTime(_Symbol, _Period, 0);
   if (t == lastBar) return;        // act once per CLOSED bar
   lastBar = t;

   double f[2], s[2];
   CopyBuffer(hFast, 0, 1, 2, f);   // start at index 1 = last closed bar
   CopyBuffer(hSlow, 0, 1, 2, s);
   ArraySetAsSeries(f, true);
   ArraySetAsSeries(s, true);

   bool crossUp = f[1] <= s[1] && f[0] > s[0];
   if (crossUp && PositionsTotal() == 0)
      trade.Buy(LotSize, _Symbol, 0, StopLossPrice, TakeProfitPrice);
}

That "act once per closed bar" guard and the index-1 buffer read are exactly the details a naive translation gets wrong — and exactly why your converted EA either matches the backtest or doesn't.

What you receive

• Commented .mq5 source code you own outright — readable, structured, with the logic explained so you (or another developer) can maintain it. NDA on request.
• Compiled .ex5 ready to drop into your MetaTrader 5 terminal.
• Input parameters exposed cleanly — periods, risk/lot settings, SL/TP, session filters, magic number — so you can tune without touching code.
• A setup guide covering installation, enabling AutoTrading, and how to run the parity comparison yourself in the Strategy Tester.
• A revision pass to reconcile any genuine logic divergence between the EA and your TradingView backtest.

I work directly with you — no agency layer between you and the developer — on milestone-based payment. If your endgame is live trading rather than just a tester, see how I build the TradingView-to-broker webhook bridge as an alternative path, and the broader MT5 EA development service for ground-up EAs.

MT4 or MT5?

Convert to MT5 unless your broker or prop firm specifically requires MT4. MT5 is the actively developed platform — better backtester (real multi-currency, tick data), a cleaner language (MQL5), native hedging/netting modes, and it's what most modern brokers and many prop firms standardize on. MT4 (MQL4) still has a large installed base, so if your funded account is MT4-only I'll deliver an .mq4/.ex4 instead. The logic work is the same either way; only the platform API differs. If you're funded or chasing a challenge, read how I structure prop-firm-compliant EAs so the converted system respects daily-loss and max-drawdown rules.

Honest pricing

Conversion is priced by complexity, in USD, milestone-based:

Tier	Typical price (USD)	What fits here
Simple	~$200 – $350	Single-timeframe, a few indicators, clear entry/exit, fixed SL/TP
Standard	~$350 – $550	Multi-condition logic, trailing/breakeven, risk-based sizing, session filters
Complex	$550 – $750+	Multi-timeframe, multi-symbol, baskets, prop-firm risk layer, repaint cleanup

The honest variable is your Pine code itself: clean, non-repainting, well-structured Pine converts fast; spaghetti logic, repaint, or undocumented "magic" conditions take longer to reverse-engineer faithfully. Send me the script and I'll quote a fixed price after reading it. For a deeper look at how rates work across Pine and MQL projects, see my breakdown of the cost to hire a Pine Script developer in 2026.

Before you convert: is your Pine even ready?

If your strategy was written for an older Pine version, it's worth confirming it compiles and behaves correctly first — my Pine v5 to v6 migration guide covers what changed. And if the Pine itself was generated by ChatGPT or Claude, assume it needs auditing before conversion: AI code routinely compiles while silently repainting or implementing subtly wrong logic, which means converting it faithfully would just port the bug into MQL5. In those cases the right move is to fix the source of truth first — either through a Pine audit or by hiring me to rebuild the strategy properly — and then convert. A correct EA can only ever be as correct as the logic you hand it; my job is to carry that logic faithfully across two very different execution models, tell you the truth about what will and won't match, and hand you maintainable source code you fully own.

FAQ

Will the MT5 EA match my TradingView backtest?

It will match the trading logic — same entries, exits, stops and targets, taking the same trades on the same bars. It will not produce identical profit to the decimal, because your MT5 broker's data feed, spread, commission and slippage differ from TradingView's optimistic tester. I aim for trade-for-trade logic parity and include a revision pass to reconcile any real divergence I introduced.

How much does it cost to convert Pine Script to MT5?

Roughly $200–$350 for a simple single-timeframe strategy, $350–$550 for standard multi-condition logic with trailing and risk sizing, and $550–$750+ for complex multi-timeframe, multi-symbol or prop-firm-risk systems. Price depends on how clean your Pine is — send me the script and I'll quote a fixed milestone-based price after reading it.

Do you deliver the .mq5 source or a locked .ex5?

Both. You get the commented .mq5 source code that you own outright, plus the compiled .ex5 ready to run. I don't ship locked, account-bound binaries — you should be able to read, audit and maintain your own system. NDA available on request.

Can you convert an indicator (not a full strategy) to an EA?

Yes, but it's more work, not less. An indicator only draws on a chart — it has no entry, exit, stop, target or sizing rules. To make it an EA I have to design and add the actual trading logic around your signals, which we'll define together before I quote. If you just want the indicator's signals to fire orders live, a webhook bridge may be a cheaper route.

MT4 or MT5 — which should I convert to?

Convert to MT5 unless your broker or prop firm specifically requires MT4. MT5 has a far better backtester, real tick data, and is the platform most modern brokers and prop firms standardize on. If your funded account is MT4-only, I'll deliver MQL4 instead — the logic work is identical, only the platform API differs.

What if my Pine strategy repaints?

I'll catch it during conversion and tell you. A repainting strategy backtests on trades it could never have taken live, so a correct, non-repainting EA won't reproduce those phantom trades — which is the honest outcome, even though it makes the numbers differ. We decide together whether to fix the logic or faithfully reproduce the original behavior.

How long does a conversion take?

A clean simple strategy is usually a few days; standard projects run about one to two weeks including the parity-comparison and revision pass; complex multi-timeframe or prop-firm systems take longer. The biggest variable is the quality of your Pine code — well-structured, non-repainting scripts convert fastest.