Buy - MFI rebounds from low in oversold region
Sell - MFI retreats from high in overbought region
Parameters available:
Period - period of MFI
Lower Limit - lower limit of MFI
Upper Limit - upper limit of MFI
x - the minimum amount that MFI 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