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MetaTrader 4 shipped in 2005, two years before the iPhone. Software from that era usually survives as a nostalgia thread on a forum. MT4 instead sits on the desktop of a large share of retail forex traders, and most brokers still list it alongside whatever newer platform they would rather you used.
There are good reasons for that, and a few bad ones. Both matter if you are deciding where to place real money.
MT4 is a client terminal. It connects to a broker's price feed and order server, draws the charts, and sends your instructions. MetaQuotes wrote the software; your broker supplies everything behind it. Prices, spreads, execution speed and slippage all come from the broker's side of that connection, which is why two people trading an identical setup on identical installs can end up with different results.
That distinction is worth holding onto. Learning what actually happens when you buy or sell a currency will improve your trading more than any indicator pack, because the platform is only the window, not the market itself.
Nine timeframes, from one minute up to monthly, plus candlestick, bar and line styles. Around thirty built-in indicators cover the usual ground: moving averages, Bollinger Bands, RSI, MACD, Ichimoku. You can save a chart arrangement as a template and load it on any pair in two clicks. None of this is remarkable now, which is rather the point. It was remarkable in 2005 and it has not broken since.
Market orders, limit orders, stop orders and stop-limit entries. Pending orders can carry an expiry date. Positions can be partially closed, and stops can trail automatically as price moves. Hedging is allowed, meaning you can hold long and short on the same pair at once, something US-regulated traders cannot do under FIFO rules. One-click trading straight from the chart is a small convenience that becomes very hard to give up.
MT4's tester runs an Expert Advisor against historical data and produces a report: equity curve, maximum drawdown, win rate, profit factor. It is useful, and it is also where plenty of people get fooled. The "every tick" mode is generated from one-minute bars rather than true tick data, so it can flatter strategies that depend on precise entries. A beautiful backtest is a starting point, never a verdict.
MetaTrader 4 runs code. That single fact explains most of its staying power. Expert Advisors, or EAs, are programs written in MQL4 that open, manage and close trades without a human touching a mouse. Custom indicators use the same language. Anything the platform cannot do out of the box, somebody has probably written a script for.
The ecosystem that grew around this is enormous and uneven. At one end sit careful developers selling tools with documented logic and honest limitations. At the other end is a marketplace full of "99% win rate" systems that turn out to be martingale grids doubling down on losers until the account dies. When you buy a compiled .ex4 file you cannot read the source, so you are trusting the seller completely. That is a genuine risk, and it has no equivalent in open-source trading tools.
MetaQuotes released MetaTrader 5 in 2010 as the successor and spent years trying to retire MT4. It did not work. MT5 is a different program with a different language in MQL5, and old EAs will not run on it without a rewrite. Traders with working systems saw no reason to start over, and brokers kept both platforms alive because their clients demanded it.
The technical differences are real, though. MT5 handles more than forex: indices, commodities, even exchange-traded futures. It has a built-in economic calendar, Depth of Market for instruments that support it, and a far stronger multi-threaded tester. Hedging only arrived in MT5 in 2016, which is part of why forex traders stayed put. If you trade currency pairs and rely on MQL4 code, MT4 remains perfectly serviceable. If you want broader asset coverage or serious optimisation runs, MT5 is the better tool.
Every MT4 install points at one specific broker server, and the gaps between them show up fast. A raw-spread account charging commission might quote 0.2 pips on EUR/USD with a $7 round turn, while a standard account at the same firm quotes 1.4 pips and no commission. Over 200 trades a year that difference is real money.
Watch execution quality during volatile moments rather than quiet ones. Requotes, slippage on stop losses and sudden spread widening all happen at the broker level, not in the software. A practical grounding in currency market trading and where brokers sit inside it will tell you which questions to ask before funding an account.
An MT4 window shows one broker's prices on a handful of pairs. The market underneath is far bigger. Daily turnover in foreign exchange runs around $7.5 trillion, and most of that flow comes from banks, funds and corporates rather than retail traders clicking buy. Reading about how that $7.5 trillion a day actually moves gives useful context for the spreads and gaps you see on screen.
Spreads widen around rollover and major data releases. Thin liquidity at 3am can produce wicks that look like manipulation and are usually just an empty order book. None of it is visible in the default view, and all of it affects your fills.
MT4 will not make you profitable, and no EA selling for $199 will either. What the platform offers is reliability, a scripting language with two decades of community code behind it, and a chart that loads instantly on almost any machine built in the last ten years.
The traders who do well with it treat it as plumbing. They know their broker's execution quirks, they size positions so a losing streak does not end the account, and they accept that how the currency market really works has very little to do with which indicator is on the chart. Learn the market first, then automate the boring parts. In that order, MetaTrader 4 is a solid companion. In the reverse order, it is an expensive way to learn about drawdown.
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