Market Phase Indicator

My little adaptation of Welles Wilder's ADX, Version 2.

Version 1 used ADX - ADX[1] effectively rate of change to determine the positive or negative slope of the ADX line. Positive being trending, and negative or zero being ranging. The rate of change introduced a 1 bar lag, creating late entries for trend trading strategies.

Version 2 uses a trigger line of the ADX, trigger_line = ADX[1]. This regains the previously lost 1 bar. The indicator reacts quickly to short-term trend fluctuations, so not perfect in any sense.

Any ideas of filters I can introduce to limit the number of entries will be great.

For the NNFX traders, I reckon this will make a nice secondary confirmation indicator, C2.