Vortex Indicator

VI · VI+ · VI−

Trend indicator measuring upward and downward vortex movement; VI+ crossing above VI− signals a new uptrend, below signals a downtrend.

+VM = |High_t − Low_{t-1}|; −VM = |Low_t − High_{t-1}|; VI+ = Σ(+VM, n) / ATR_n_sum; VI− = Σ(−VM, n) / ATR_n_sum