This indicator was developed by Etienne Botes and Douglas Siepman. Indicator Vortex consists of two oscillators that display positive and negative trend movements, similar to lines +DI and -DI of indicator Average Directional Movement Index.
It has one input parameter:
- Period - indicator calculation period.
Calculation:
+VI = 100 * svip / satr,
-VI = 100 * svim / satr
where:
svip = SMA(iVIP, Period)
svim = SMA(iVIM, Period)
satr = SMA(ATR, Period)
iVIP = Abs(High - PrevLow)
iVIM = Abs(Low - PrevHigh)