MQL5 compiler diagnostic
MQL5 wrong parameters count is compiler code 199. The call does not match the selected function or overload. Open the current MQL5 signature, count required and optional arguments, check their order, and remove MQL4-style arguments that the MQL5 API replaced with handles or structures.
Open the Coding Agent and choose MQL5 from the language menu.
int ma_handle=INVALID_HANDLE;
int OnInit()
{
ma_handle=iMA(_Symbol,_Period,20,0,MODE_SMA,PRICE_CLOSE);
return ma_handle==INVALID_HANDLE ? INIT_FAILED : INIT_SUCCEEDED;
}MetaEditor reports wrong number of parameters in the function when the source cannot satisfy the language or API contract at that location. Compile errors prevent creation of the EX5 program until they are resolved.
Start with the first error in the build output. A missing delimiter, declaration, or include can make later lines produce secondary messages that disappear after the root cause is fixed.
Compare the exact failing line with its declaration and the official reference. Keep the compiler line and column in the repair prompt or issue report.
Change the call and its surrounding data flow to match one documented overload. Do not add placeholder arguments merely to satisfy the count because their types and meanings must also match.
Compile after each coherent edit. When the first diagnostic moves or disappears, re-read the remaining list instead of applying stale fixes from the previous build.
In MQL5, iMA creates an indicator handle with the documented parameter list. Read values later with CopyBuffer rather than adding an MQL4 shift argument to the constructor.
A clean compile or a cleared error code does not prove strategy logic, broker compatibility, backtest quality, or live-trading safety. Reproduce the result in the target MetaTrader 5 terminal and account environment.
int ma_handle=INVALID_HANDLE;
int OnInit()
{
ma_handle=iMA(_Symbol,_Period,20,0,MODE_SMA,PRICE_CLOSE);
return ma_handle==INVALID_HANDLE ? INIT_FAILED : INIT_SUCCEEDED;
}Pineify can generate or revise MQL5 source and use MQL5 compilation diagnostics during the coding workflow. Keep the exact error, source location, program type, and intended behavior in the request so the change remains reviewable.
Open MQL5 Coding AgentPineify does not run your broker terminal, Strategy Tester, market data, or live orders. Validate the final program in your own MetaTrader 5 environment.
Review MQL5 AI Coding Agent capabilities
Record the message, code 199, file, line, and column from MetaEditor 5.
Open the first failing line and inspect the declaration, delimiters, include dependencies, and nearby syntax before touching later messages.
Change the call and its surrounding data flow to match one documented overload. Do not add placeholder arguments merely to satisfy the count because their types and meanings must also match.
Press F7, confirm the compiler result, then run the EA, indicator, or script in the appropriate MetaTrader 5 test environment.
The official MQL5 compilation table defines code 199 as "Wrong number of parameters in the function."
No. Fix the first credible root error and compile again. One malformed statement can create several downstream diagnostics.
No. Compilation validates source and type contracts. Runtime behavior, order handling, strategy logic, and broker compatibility require separate tests.
Last verified against the linked official references on . Compile and test the final source in the MetaTrader 5 build, broker, symbol, and account environment you plan to use.
Provide the exact diagnostic and intended behavior, inspect the generated change, compile it, and verify it in your MT5 test environment.
Open MQL5 Coding Agent