Hey Mike.
Yes, for the shorter term systems i.e. MOC/MR I definitely saw improvement with using the ADX as my index filter. CAR improved and DD was improved as well.
I had also experimented with using other indicators as well i.e. RSI, ROC, ATR etc.
But for my shorter term system(s), using the ADX as my index filter improved results to the point where it warranted inclusion.
For the past 2 days, my ADX Index filter turned off…. so no new trades entered for the past 2 US trading sessions.
I am also using the SPX as my reference INDEX, but I also tried RUI, DJI as well…. so it was a bit of trial an error etc
And like Nick advocates test it, test it, test it……