MT5 · Runtime errors
MT5 4106 · Failed to change chart symbol and period | YI GOLD
ERR_CHART_CANNOT_CHANGE
Official meaning
Failed to change chart symbol and period
Possible causes · YI GOLD suggestions
Indicator, chart or history data is unavailable or handles, parameters and periods are incompatible.
Troubleshooting · YI GOLD suggestions
Verify symbol, timeframe, indicator handle, BarsCalculated and copied element counts. Wait for data availability rather than filling missing prices with zeros.