Bollinger Band
Derived from the original and initial Bollingers.
The Bollinger Fib ratios is a volatility based indicators but it doesn't use the standard deviation to calculate width of bands instead it uses a smoothed ATR that are multiplied with Fibonacci ratios of 1.618, 2.618, and 4.236.
The smoothed lines that are multiplied with Fibonacci ratios are then added or subtracted from the Moving Average.
This forms Three upper Fibo bands and 3 lower Fibo bands
Middle band forms the basis of the trend.

Technical Analysis and How to Generate Trading Signals
This indicator used to identify point of support & resistance for indices.
Lines below represent support levels while those above are resistance areas.
The outer-most bands provide the strongest resistance/support.
The inner most bands provide least support/resistance.
The innermost band represents Fibo 38.2 % retracement level
The second band represents Fibo 50 % retracement level
The outermost band represents Fibo 61.8 percentage retracement level
The indicator is used to identify points where indices trading price might reverse. (Price Pull-back Levels)
When stock indices trading price hits one of the lines & reverses then an entry or exit trading signal gets generated.
However, it's always good to combine the signal with other confirmation indicators such as the moving average to confirm the signal such as illustrated and shown below.

Technical Analysis in Indices Trade
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