Why does a slot jump when the higher-timeframe bar closes?
Because On Bar Close? is OFF on that slot. OFF uses the live higher-timeframe bar, and live bars can keep moving until they close. Turn that slot's On Bar Close? ON if you want the line to update only on confirmed higher-timeframe bars.
What does the blended line actually mean?
It is a weighted average across the slots you chose to weight. It is a compact context read, not a verdict. A strong blended value can still sit on top of one loud slot and two neutral ones — which is why the slot plots remain visible. If the blend and the slots disagree, the disagreement is the information.
Can I read the overbought and oversold levels the same way as on a normal MACD?
Not quite. Those guides sit on the normalized 0..100 axis, not on raw MACD values. They are useful as stretch markers relative to this pane, but they are not interchangeable with the 0 line on a standard MACD.
Does pointing a slot at a correlated symbol predict the chart?
No. A cross-asset slot is context — how that other symbol is leaning right now in its own MACD terms — not a leading signal for the chart symbol. If you catch yourself treating it as predictive, scale its Blended Weight down until you stop.
Are there cross or flip alerts?
Not in this build. The compiled alerts describe current state at bar close — bullish or bearish — per slot, for the blend, and for the all-slots case. If you need an alert on the moment of change, build it on top of the state alerts rather than assuming one ships with the tool.