Troubleshooting

Each entry gives the symptom, the reason and the fix. Messages are quoted exactly as the software shows them. Results come from an approximate backtest on past data and do not guarantee future results.

If the fix does not work, use the contact page and include the exact message and what you clicked before it appeared.

MetaTrader 5 results differ from the Miner

Symptom. The Strategy Tester in MetaTrader 5 shows different trades or a different profit than the Miner showed for the same strategy.

Reason. The Miner and MetaTrader 5 use different price bars, costs and fill rules. The exported file carries only the trading logic, so the settings below are not copied into it.

Fix.

1. Open the .mq5 file and read the comment block headed VALIDATION SETTINGS (Pro). The line starting Checked under: gives the symbol, the timeframe and the period. Each row below it is marked EXPORTED, VALIDATION-ONLY or NOT-EXPRESSIBLE. VALIDATION-ONLY means the Miner used the value for the check but the code does not carry it.
2. Run the Strategy Tester on the same symbol and timeframe, over a date range inside that period.
3. Set the tester’s spread to the value in the spread row, if the row shows one.
4. If the line starting Checked under: reads edited after validation, the strategy was changed after it was checked, so no recorded settings are shown.

The line Match with the platform tester: not verified is in every exported file. The software does not claim that the tester will reproduce the Miner’s numbers.

Related. MetaTrader 5 export and Match check show what has been compared with the tester.

MetaEditor does not compile the file

Symptom. MetaEditor shows errors after F7, or the EA compiles but does not start.

Reason and fix.

• Wrong file type or editor. An .mq5 file compiles in MetaEditor for MetaTrader 5. An .mq4 file (MT4 export) compiles in MetaEditor for MetaTrader 4. Open the file in the editor that matches its extension.
• The file was edited. Compile the file as downloaded first. If it compiles, the error comes from your edit.
• The export has a gap. If a block cannot be exported to the chosen target, the Builder does not write a file. It shows a list instead. See An export stops.
• The EA compiles but is removed from the chart. Open the Experts tab in MetaTrader 5.
  • Handle error: <number> means an indicator could not be created. If the flow uses a custom indicator block (iCustom in the code), the indicator named in the block must be compiled and placed in MQL5/Indicators first.
  • Target symbol not available: <name> means a multi-symbol flow names a symbol your broker does not offer. Use the symbol names exactly as your broker lists them.

The download dialog repeats the steps: open the file in MetaEditor (in MetaTrader 5, press F4), press F7, then put the .ex5 in the MQL5/Experts folder.

Related. Quickstart covers the MT5 steps, and MetaTrader 5 export the compile steps.

The vault is full (409 limit_reached)

Symptom. After a search, the note under the result reads The vault is full ({count}/{limit}). Delete the ones you do not need, then run again.

Reason. The vault keeps up to 10,000 strategies per account. The server saves a run’s results as a whole. If they would not fit, it refuses with 409 limit_reached and saves none of them. The results stay on screen as cards.

Fix.

1. In the Vault table, tick the strategies you do not need. The bar above the table shows how many are selected.
2. Click Delete and confirm: Delete {n} strategies from your vault? Later runs may then produce them again.
3. Run the search again.

A continuous search stops with the same message. Related messages:

Related. Vault explains how to delete strategies, and Limits gives the vault size.

A request is refused for being too frequent (429)

Symptom. A message says to wait and try again.

Reason. Some server requests have a limit per minute. The search itself runs in your browser and does not use these.

Fix. Wait about a minute, then try again. Code preview and export share one limit, so a quick run of previews can block the next download. The same message appears when the daily allowance for saved summaries is used up; try again the next day (UTC).

Related. Limits lists every request limit. For AI requests, see Connect your AI and Limits and safety.

A CSV file is refused

Symptom. Importing your own bar data (Pro) ends with a message and no data is saved.

Reason and fix. The software refuses data it cannot use correctly. Pick the row that matches your message.

After the file is read, the screen lists quality checks. A check marked as an error ends with Import refused. The main ones:

Problems after saving, or when you run a search on imported data:

Related. Use your own CSV data explains the import, and Limits the file limits.

An added symbol cannot be read

Symptom. You pick a symbol in the Symbol list that is marked download first and press Generate. The result area shows {pair} has not been downloaded yet. Download it under "Add currencies", then press Generate.

Reason. The 8 built-in symbols are ready to use. The other symbols need a one-time download. The browser keeps the downloaded data, so later runs do not download it again. The list of symbols you chose is kept in the browser’s local storage. If you clear site data, both are gone.

Fix.

1. Open Add currencies.
2. Click Download next to the symbol. The button reads Downloading… while it works.
3. Press Generate again.

Other messages:

In Add currencies, a symbol shows Choosing 8 or 10 years adds about {kb} KB or Choosing M15 or M30 adds about {kb} KB only if it has that data.

Related. Symbols, timeframes and data lists which symbols have long periods and 15 and 30 minute bars, and Run a search explains the settings.

Pro does not show up after purchase

Symptom. You paid, but the Miner still shows the demo, the Builder shows no PRO badge, or a Pro action opens a purchase dialog.

Reason. Pro is linked to the account you were signed in to when you paid. The page also has to read the new plan.

Fix.

1. Check that you are signed in with the account you used at the purchase.
2. Reload the Strategy Builder or the Strategy Miner. The PRO badge appears in the header when the plan is confirmed.
3. If the Builder says Your account is not eligible yet. Please verify your email address and try again., confirm the email address of the account.
4. If a dialog says Sign in to unlock the source, sign in. If it says Editable .mq5 source is a Pro feature (the file type follows the chosen target), the signed-in account does not have Pro.

Messages on the pricing page:

If the plan check fails, a search or a continuous search ends with Your Pro plan could not be confirmed. Reload the page and start it again. See Pricing for what Pro includes.

An export stops (target_blocked)

Symptom. You click a download or open the code tab, and the Builder shows These parts cannot be exported to the selected target: with a list. The affected blocks are outlined on the canvas.

Reason. The chosen target cannot express one or more blocks or settings. The server refuses with 422 target_blocked and gives a reason for each one. It does not leave a block out of the file. Examples of reasons:

• Multi-symbol flows (a symbol on a part, or a target_symbols pair loop) are MT5 only; the MT4 export handles the single chart symbol
• Parts that decide in the middle of a bar (every tick) are MT5/MT4 only; every other target decides at bar close and fills at the next bar open
• Calling an external MetaTrader indicator (.ex5/.ex4) by name is MetaTrader only
• A part that reads the forming bar (shift 0) cannot be expressed in Pine (it decides at bar close). Use shift 1 or more
• A part that reads another timeframe is not exported to this target: how the higher-timeframe bar index maps is not confirmed in the official docs
• The Python exporter does not cover this part yet (only parts whose trades were checked against the in-house validator are exported)
• An indicator (…) is wired straight into an action (…); the signal would be always true. Insert a condition node (compare / cross) in between

Fix. Read the reason on each row, then do one of these:

• Change or remove the listed block, for example set the bar shift to 1 or more, or put a condition block between an indicator and an action.
• Choose another export target in the toolbar. MT5 accepts the widest set of blocks.

Export is a Pro feature. See Quickstart for the MT5 steps.

Related. Why a block is not exported explains each reason, Export limits lists what each target cannot express, Validation lists the checks the Builder makes before an export, and Free and Pro and Upgrade to Pro explain how the plan is confirmed.