SPDR S&P 500 (SPY)

[bobjack]

Gleno, ADX(14) on a weekly chart is like your 65,90,12 macd,
it does not respond to quick changes (relative terms).

ADX only tells if there is a trend, NOT, direction, where the DMI + and - show direction of trends. Therefore the ADX has to drop from showing a large downtrend to RESET, so that it can Start Going Up again to Show An Uptrend Starting, and Vice Versa.

Look at the same chart, except set to daily instead of weekly, you will see the ADX showing The Change In Trend, ESPECIALLY If You Set ADX to 10.
OR, set The ADX to 3 Days while on the Weekly Chart, You Will Also See The Change In Trend.
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Best Is To Watch The Same Chart in:
60 Min
Daily
Weekly
Monthly Modes -- you see all the trends
BUT, You Already Knew That, Didn't You.

Thanks For The Charts You Posted For Myself and Be,
I Use Them Everyday!!!
bobjack