Where do I put the EA file in MT5?

File > Open Data Folder > MQL5 > Experts. Copy the .ex5 there, then right-click Expert Advisors in the Navigator and Refresh.

Why is my EA not trading on MT5?

Usually AutoTrading is off, Allow Algo Trading wasn't ticked, there's a sad face, the wrong symbol/timeframe is loaded, the market is closed, or the spread is above the EA's filter.

What does the smiley face mean on an MT5 chart?

A smiley in the top-right means the EA is active and allowed to trade. A sad face means algo trading is disabled. No face means no EA is attached.

Can I run the same EA on multiple charts or computers?

Yes - use a unique magic number per chart, and copy the .ex5 to each machine's Experts folder. Gold Scalpers EA has no device lock.

What is the difference between an .ex5 and an .mq5 file?

.mq5 is source code; .ex5 is the compiled runnable version. Run an .ex5 directly, or compile an .mq5 in MetaEditor with F7.

Setup Guide

How to Install an EA on MT5 (Step-by-Step)

June 26, 20266 min read

Installing an Expert Advisor on MetaTrader 5 takes about five minutes. Here's the whole process — copy the file, enable AutoTrading, attach to a chart, confirm it's running — plus a troubleshooting checklist. No EA yet? See the best MT5 EAs of 2026.

Before you start

You need MT5 installed and logged into a broker (demo is fine), plus your EA file — an .ex5 (ready to run) or .mq5 (source you compile).

Step 1 — Open the data folder

In MT5: File ▸ Open Data Folder, then open MQL5 ▸ Experts.

Step 2 — Copy the EA file in

Copy your .ex5 into that Experts folder (an .mq5 works too — you'll compile it next).

Step 3 — Refresh the Navigator

Back in MT5, right-click Expert Advisors in the Navigator (Ctrl+N) and choose Refresh. For an .mq5, double-click it and press F7 in MetaEditor to compile.

Step 4 — Enable AutoTrading

Click the AutoTrading toolbar button so it turns green — the master switch for all EAs.

Step 5 — Attach the EA to a chart

Open the right symbol/timeframe (Gold Scalpers EA runs on XAUUSD), drag the EA on, then in the dialog tick Allow Algo Trading (Common tab), set inputs (Inputs tab), and click OK.

Step 6 — Verify it's running

Top-right of the chart: a smiley 🙂 = active and allowed to trade; a sad face ☹ = algo trading disabled (recheck Steps 4–5). Watch the Experts/Journal tabs (Ctrl+T).

Multiple charts or devices

Use a unique magic number per chart, and copy the .ex5 to each computer's Experts folder. Gold Scalpers EA has no device lock — install and backtest it on multiple devices freely.

Troubleshooting

Symptom	Fix
Sad face	Tick "Allow Algo Trading" and turn AutoTrading green
No face	Drag the EA onto the chart again
Loaded but no trades	Wrong symbol/timeframe, market closed, or no signal yet
Trades rejected	Spread above filter, low margin, or invalid lot
EA missing	Not in MQL5\Experts, or needs Refresh/recompile

Next: backtest it and forward-test on demo before going live.

Ready to install Gold Scalpers EA?

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