The STARC Bands forex indicator is a popular and useful trading tool that is available for free on the MT4 trading platform. The indicator is based on the Average True Range (ATR) and uses two bands, one at the upper end and one at the lower end of the price range. The bands are calculated using the ATR and the standard deviation of the ATR. The STARC Bands indicator works by displaying the upper and lower bands when the price reaches those levels. By using the STARC Bands indicator, traders can gain insight into the current market conditions and make informed decisions about their trades.