MT5 · Runtime errors
MT5 5308 · A wrong parameter while setting the property of a custom symbol | YI GOLD
ERR_CUSTOM_SYMBOL_PARAMETER_ERROR
Official meaning
A wrong parameter while setting the property of a custom symbol
Possible causes · YI GOLD suggestions
Parameter types, counts or ranges do not match the function signature.
Troubleshooting · YI GOLD suggestions
Compare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context.