The overbought/oversold indicator, which was first described in "Futures Magazine" in June 2000, under the name of "Psychological Index".
It has one input parameter:
- Period - indicator calculation period.
Calculation:
PsyIndex[i] = SMA(UpDay)
where
- If Close[i] > Close[i-1]UpDay[i] = 1,
- otherwiseUpDay[i] = 0
