Buy - Williams %R rebounds from low in oversold region
Sell - Williams %R retreats from high in overbought region
Parameters available:
Period - period of Williams %R
Lower Limit - lower limit of Williams %R
Upper Limit - upper limit of Williams %R
x - the minimum amount that Williams %R rebounded(buy)/retreated(sell) from lower(buy)/upper(sell) limit
t - the maximum number of periods for the rebound(buy)/retreat(sell) to happen
Rule type - please refer to 140 for details
Data type - please refer to 141 for details