MT5 error 10018: Market is closed
Check the symbol's trading sessions for the current day with SymbolInfoSessionTrade() before sending.
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
10018TRADE_RETCODE_MARKET_CLOSED- Market is closed
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
The order was sent outside the symbol's trading sessions: the weekend, a holiday or the broker's daily break.
The fix in MQL5
Check the symbol's trading sessions for the current day with SymbolInfoSessionTrade() before sending. Holidays are not in the session table, so expect the code on those days too.
#include <Trade/Trade.mqh>
CTrade trade;
void OnTimer()
{
trade.Buy(0.10, _Symbol); // fires on Saturday too
}#include <Trade/Trade.mqh>
CTrade trade;
bool InTradeSession(const string symbol)
{
MqlDateTime t;
TimeToStruct(TimeTradeServer(), t);
const datetime now = (datetime)(t.hour * 3600 + t.min * 60 + t.sec); // seconds since midnight
datetime from, to;
for(uint i = 0; SymbolInfoSessionTrade(symbol, (ENUM_DAY_OF_WEEK)t.day_of_week, i, from, to); i++)
if(now >= from && now < to)
return(true);
return(false);
}
void OnTimer()
{
if(InTradeSession(_Symbol))
trade.Buy(0.10, _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 10017: Trade is disabled
- 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.