The Standard Deviation Indicator (StdDev) measures the market volatility. This indicator describes the price standard deviation value relative to the Moving Average. The higher the Standard Deviation is, the more instable (volatile) the market is, i.e., bars prices are rather dispersed relative to the moving average. Opposite, the lower the deviations is, the more immovable the market is, i.e., the bars prices are approaching to the moving