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That's exactly what I'm thinking. Does it mean that wave iv is not yet complete then?

That is my conclusion. Haven't watched the video yet, so I don't know whether Heajin went through that possibility. Basically shifts everything over to the right, but wave 4 could conceivably go a ways up before turning down...just can't overlap with green circled wave 1 in this chart

PS. you can ignore the dashed lines, just my sell point (purple) and buy ladder :)

Great work...thanks for sharing :)