<<Isn't it possible that your 10/19 "Change Date" was a (late) low>>
Disciple, I don't think so, because (since April) I'd had a signal for a "Change of Direction Point" for October 14th and the market did, in fact have a low on 10/14, then the market changed direction and went up into Tuesday morning coincident with the 10/19 "Change of Direction Point", and then fell the rest of the day.
The length of time following a Momentum high or low doesn't have to be multiple days, sometimes the change of direction can be measured in hours, although even with the rally days of Wednesday and Thursday, the Momentum Peak (in my work) came on Tuesday morning.
Jim
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