Sorry, in my testing this +\- crap, spent enough time I could have walked cross the states. Not to say others didnt found useful. The ADX is ok I guess. I am a bit different in half my systems use variety of indicator entry generated but optimized over 3 timespans so it don't go with could be best but the "mean". I don't believe in one indicator for trading entire chart as price action when studied often best for exits. Indicators best used to indicate and stats give me a yes no. Enjoy the ride
The IB version of Wilders ADX/DMI is usually pretty good, but it was clueless about today's 10% (3.22 to 2.96) March NG futures fall. See IB hour chart with ADX/DMI indicator on the bottom. ADX did rise. DMI+ was low but constant. There was some DMI- but it was also constant. The Wilder indicator was worthless on such a huge NG price fall. Maybe because the end of fossil fuel fanatics were active.
It's mathematics -- but G.I.G.O. If you don't adjust it to fit the market -- Guess what? That's right: it won't fit the market. Remember this: When you really learn the ADX/DMIs, you can draw the operative candles just be looking at it. That's some serious indicatornessishness.