MT5 error 10017: Trade is disabled
Check SYMBOL_TRADE_MODE before sending, and ACCOUNT_TRADE_ALLOWED too: MQL5's documentation gives a login with the investor (read-only) password as one case…
Updated 22 October 2026. Runs in your browser; nothing you type is uploaded.
The number after retcode= in MT5's Experts or Journal tab. 41 codes, as MQL5's reference words them.
What MQL5 says
10017TRADE_RETCODE_TRADE_DISABLED- Trade is disabled
From MQL5's table of trade server return codes, read 22 October 2026. An Expert Advisor finds it in MqlTradeResult.retcode; the Experts and Journal tabs print it.
What causes it
Trading is off for this symbol, for example when its trade mode is SYMBOL_TRADE_MODE_DISABLED.
The fix in MQL5
Check SYMBOL_TRADE_MODE before sending, and ACCOUNT_TRADE_ALLOWED too: MQL5's documentation gives a login with the investor (read-only) password as one case where an account cannot trade at all.
#include <Trade/Trade.mqh>
CTrade trade;
void OpenBuy(const string symbol, const double lots)
{
trade.Buy(lots, symbol);
}#include <Trade/Trade.mqh>
CTrade trade;
void OpenBuy(const string symbol, const double lots)
{
const long mode = SymbolInfoInteger(symbol, SYMBOL_TRADE_MODE);
if(mode == SYMBOL_TRADE_MODE_DISABLED)
{
Print(symbol, ": trading is disabled for this symbol");
return;
}
if(!AccountInfoInteger(ACCOUNT_TRADE_ALLOWED))
{
Print("Trading is disabled for this account (an investor-password login, for example)");
return;
}
trade.Buy(lots, symbol);
}Both compile in MetaEditor 5 with no errors or warnings. Adapt them to your EA; they were not run against a trade server.
Other MT5 errors
- MT5 error 10004: Requote
- MT5 error 10006: Request rejected
- MT5 retcode 10009: Request completed
- MT5 error 10013: Invalid request
- MT5 error 10014: Invalid volume in the request
- MT5 error 10015: Invalid price in the request
- MT5 error 10016: Invalid stops in the request
- MT5 error 10018: Market is closed
- MT5 error 10019: There is not enough money to complete the request
- MT5 error 10021: There are no quotes to process the request
- MT5 error 10022: Invalid order expiration date in the request
- MT5 error 10026: Autotrading disabled by server
- MT5 error 10027: Autotrading disabled by client terminal
- MT5 error 10030: Invalid order filling type
- MT5 error 10031: No connection with the trade server
- MT5 error 10044: The request is rejected, because the "Only position closing is allowed" rule is set for the symbol
- MT5 error 10046: The request is rejected, because the "Opposite positions on a single symbol are disabled" rule is set for the trading account.
Read a whole MT5 EA's source
- MTR FullSystemEA (MQL5 source) The full MQL5 source of a production MT5 EA for XAUUSD M5 (hedge-grid and recovery): 21 files, 16,923 lines. $49 once.