Bollinger Bands MT4 Indicator and Bollinger Band Signals

Developed by John Bollinger

Bollinger Bands are formed by three lines. Middle line is a MA - 20 period Simple MA.

The bands are then plotted at a distance away from the Moving Average These are the bands that form the lower and upper lines.

The distance where the bands are plotted is determined by another MT4 Indicator called the standard deviation. Standard deviation is a gauge of volatility in the market or that of a currency pair.

Since the market volatility keeps on changing, the standard deviations will keep fluctuating, & since Bollinger bands are plotted using the standard deviation the distance of the bands will keep on adjusting themselves to the market conditions.

When the markets become more volatile, the bands widen & they contract during less volatile periods.

The 3 Bands are designed to encompass the majority of a currency price action. The middle band forms the basis for the market trend, typically a 20-periods simple MA.

This band also serves as the base for the upper and lower bands. The upper band's and lower band's distance from the middle band is determined by volatility. The upper band is plotted at +2 standard deviations above the middle band while the lower band is plotted at -2 standard deviations below the middle band.

MetaTrader 4 Indicator & How to Generate Trade Signals

• Bands provide a relative definition of high and low

• Used to identify periods of high & low volatility

• Used to identify periods when prices are at extreme levels

Consolidation - the Squeeze

The bands tighten as volatility lessens, this identifies periods of consolidation. Sharp price breakouts tend to occur after the bands tighten.

Consolidation Pattern

Continuation Signal - the Bulge

If prices break through the upper or lower band move outside the bands a continuation of the current trend is expected.

Reversal Signals - Double Tops and Double Bottom Setups

Bottoms & tops made outside the bands followed by bottoms and tops made inside the bands call for reversals in the market trend

The Head Fake - FX Whipsaw

Traders should be on the lookout for false breakouts known as fake outs or head fakes.

Price often breaks out in one direction immediately following the Squeeze causing many traders to think the breakout will continue in that direction, only to quickly reverse & make the true, more significant breakout in opposite direction.

Traders acting quickly on the initial breakout often get caught on the wrong side of the price action, while those traders expecting a 'false breakout' can quickly close out their original position and enter a trade in direction of reversal. It is always good to combine Bollinger bands with other confirmation MT4 Indicators.