This script can help traders to determine if there is a buy or sell signal.
It indicates when the 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.
This indicator gives accurate signals with this configuration:
Williams %R: period length 12
MA period: period length 8
bands: period length 6