Pine Script vs MQL5: which should your strategy be coded in?

You have a strategy and want it coded. The two most common choices are TradingView's Pine Script and MetaTrader's MQL5. They are not competing versions of the same thing — they are built for different jobs, and the right one depends mostly on what market you trade and how hands-off you want execution to be.

The short answer

• Choose Pine Script if you want to research an idea quickly, see it on charts, get alerts, or trade Indian markets where TradingView is already where you work.
• Choose MQL5 if the strategy must run fully unattended on forex, metals or CFD indices, with tick-level control over orders and risk.
• Choose both — prove it in Pine, then port it to MQL5 — if you want fast research and robust automated execution. This is a common path, and the reason TradingView-to-MT5 conversion is a standard service.

Side by side

	Pine Script (TradingView)	MQL5 (MetaTrader 5)
Where it runs	On TradingView's servers, inside the chart	In your MetaTrader terminal, usually on a VPS
Language	Purpose-built for charting; concise and quick to write	C++-like, general-purpose; more code, far more control
Placing real orders	Through alerts and webhooks to a broker or bridge, or TradingView's own broker integrations	Directly, from the EA, to the broker the terminal is logged into
Backtesting	Bar-based Strategy Tester; intrabar detail is approximated	Strategy Tester with real-tick modelling, multi-currency tests and fast optimisation
Markets	Very wide — Indian equity and F&O, forex, crypto, global stocks	Whatever your MetaTrader broker offers — mostly forex, metals, CFDs
Indian markets	Natural fit; widely used by Indian traders	Rarely available for NSE/BSE instruments through retail brokers
Speed of building	Fast — an idea can be on a chart within hours	Slower — order handling and edge cases take real work
Best at	Research, visual indicators, screening, alerts	Unattended execution, risk control, multi-symbol systems

Where Pine Script wins

Speed of iteration. Pine handles data loading, charting and plotting for you, so a strategy that would be hundreds of lines in MQL5 can be a few dozen in Pine. For testing whether an idea is worth pursuing at all, that matters more than anything else.

Market coverage. One script can be applied to Nifty, a US stock and EURUSD without changing platforms. For Indian traders in particular, TradingView is usually already the charting tool.

Alerts. Turning a condition into a phone or email alert is simple, and webhook alerts — available on paid TradingView plans — can pass signals on to a broker API or execution bridge.

Where MQL5 wins

Execution control. An EA decides exactly how an order is sent, what happens if it is rejected, how stops trail tick by tick, and when to stop trading for the day. With Pine alerts, that control sits in whatever system receives the webhook.

Testing detail. MetaTrader 5 can replay real recorded ticks, including spread, which matters a great deal for scalping and tight-stop strategies. Pine's tester works from bars and has to approximate what happened inside them.

Risk enforcement. Daily loss limits, equity stops and exposure caps can be enforced in code before any order leaves the terminal — the reason funded traders use prop firm risk modules built in MQL5.

Common mistakes on both sides

• Pine: leaving commission and slippage at zero in the Strategy Tester, and scripts that repaint — evaluating on unclosed bars or misusing request.security(). Both make results look better than they can be. The fixes are in how to stop Pine Script repainting.
• MQL5: testing in a fast, approximate modelling mode and trusting the result, and EAs that lose track of their state when the terminal restarts. Both are covered in why an EA works in backtest but not live.

If you're still unsure

Ask two questions. Where does your broker let you trade the instrument? And do you want to be at the screen when trades happen? Indian F&O and "I'll take the trade when the alert fires" points to Pine. Forex or gold, running around the clock while you sleep, points to MQL5. Everything else is usually a case for starting in Pine and porting once the idea has earned it.