Williams + BB Buy Sell signal

Williams %R with Bollinger Bands

This script can help traders to determine if there is a buy or sell signal.
It indicates when the Williams %R crosses the Bollingers bands levels at the overbought and oversold areas.

Red cross: when the Williams crosses the upper level of BB in the overbought area, that can be considered as a double confirmation to sold.
Green cross: when the Williams crosses the lower level of BB in the oversold area, that can be considered as a double confirmation to buy.

Configuration:
This indicator gives accurate signals with this configuration:
Williams %R: period length 12
MA period: period length 8
Bollinger bands: period length 6