Error 4112 in MetaTrader 4 (MT4): What It Means and How to Fix It

You sit down at your desk, MetaTrader 4 open, ready to start the trading day. Your expert advisor has been running smoothly for weeks, but today something is wrong. You click to place a trade, and nothing happens. You check the Experts tab and see a line of red text: OrderSend failed with error #4112. The EA that usually works without issue is suddenly locked up, and you have no idea why.

This is a frustrating experience, but it is also one that many MT4 users encounter at some point. The good news is that error 4112 is a known issue with a clear explanation and, in most cases, a straightforward fix. The bad news is that the fix depends on understanding what this specific error actually means—and it might not be what you expect.

What Error 4112 Actually Means

Error 4112 corresponds to ERR_TRADE_EXPERT_DISABLED_BY_SERVER in the MQL4 reference . The key part of that definition is "disabled by trade server." Unlike many MT4 errors that relate to your local settings, a missing DLL, or a coding mistake, error 4112 means that your broker's server is actively rejecting automated trading requests from your EA or script .

It is a server-side block, not a terminal-side glitch. This distinction is critical because it changes where you need to look for a solution.

Common Causes of Error 4112

1. Your Broker Does Not Allow Automated Trading

The simplest and most obvious reason: some brokers do not permit algorithmic trading on certain account types. While less common today, some prop firms or specific account tiers may disable EA usage by design. If your broker's rules prohibit automated trading, there is nothing you can change in the MT4 settings to bypass it .

2. Broker Requires Prior Permission

Many brokers do allow EAs but require you to request permission before they will activate auto-trading on your account. This is often a compliance measure. If you have not explicitly asked your broker to enable automated trading, error 4112 may be the result .

3. Your Account Type Does Not Support Expert Advisors

Some brokers offer multiple account types, and automated trading may be available only on certain ones. For example, a standard account might allow EAs, while an Islamic or a zero-spread account might not .

4. Wrong Symbol or Market Conditions

In some cases, error 4112 appears when trying to trade specific symbols where the broker restricts algorithmic activity. This can also happen if your broker only allows automation on a subset of available instruments .

5. Outdated Terminal Build

Although less common, some traders have reported error 4112 when using an older, outdated MT4 build. The server may reject trading requests from a terminal version that is no longer supported .

What Will Probably Not Fix Error 4112

If you search online, you will find advice suggesting you check the "AutoTrading" button in MT4 or verify that "Allow live trading" is checked in the EA's properties. While these are essential steps for using any EA, they will not fix error 4112 . Failing to enable automated trading locally produces a different error message. Error 4112 explicitly means the server is blocking the request, so local settings are not the root cause .

How to Actually Resolve Error 4112

Because the issue lies with the server, the solution is to address it at the source:

• Contact your broker directly. Explain that you are receiving error 4112 when attempting to use an EA and ask them to enable automated trading on your account. If permission is required, they can activate it on their end .
• Check your account terms. Verify whether your current account type permits algorithmic trading. If not, you may need to upgrade or switch to a different account.
• Consider a broker change. If your broker fundamentally does not allow EAs and that is a dealbreaker for your strategy, finding a broker that supports automated trading is the only realistic option.

How Camovia Tray Can Help

While error 4112 requires direct broker intervention to resolve, it highlights a broader challenge: managing your trading activity within MT4 is not always seamless, even when the terminal is working correctly. You may need to check on your open positions, view live prices, or confirm whether your EAs are functioning without constantly switching back to a full-screen MT4 window.

This is where Camovia Tray fits into the workflow. It is a Windows 10/11 tray tool that turns your MT4 into a compact, always-accessible utility [product_knowledge]. With it, you can quickly hover over the system tray icon to check real-time quotes on your favourite symbols—no need to reopen the entire terminal for a glance at the market. You can also view your open positions directly from a floating panel, seeing key details like symbol, direction, lot size, open price, and current profit or loss at a glance [product_knowledge].

For traders managing multiple terminals or using a VPS, Camovia Tray provides a convenient way to monitor activity without cluttering your screen. Its one-click hide function also lets you tuck the MT4 main window away entirely—removing it from the taskbar and Alt+Tab switching list until you are ready to bring it back [product_knowledge]. If privacy is a concern while working in a shared space, the tray icon can even be disguised as a cloud drive or system tool [product_knowledge].

While Camovia Tray cannot override a broker's server-level restrictions like error 4112—nothing can, except the broker itself—it can make your time with MT4 more efficient, organised, and less intrusive. It reads all quote and position data directly from your local terminal, so your information stays on your computer and never gets uploaded elsewhere [product_knowledge].