Jon,
I am following OptionsXpress Flexcharts, with real time, streaming data. Prophet Net might be giving you a 15" delay. That is what I discovered using it.
I am also comparing my Flexchart with what the QT chart is showing, since there is always some divergence. When I made my decision Friday afternoon, just before the close, I was nervous because I was "jumping the gun" as usual. The EMAs had turned down, and the DO had also, but only by the slimmest margin. The DMI is the slowest and was still on a buy signal. So I took a chance and it worked out.
QT, and Flexcharts gives you after market and premarket trading activity.
Chico