MT4 · Runtime errors
MT4 4210 · Unknown chart property | YI GOLD
ERR_CHART_PROP_INVALID
Official meaning
Unknown chart property
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.