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what do you mean by extend the dotted lines? Just drag them out further and later down the road the chart will hit the lines?
Can you go into detail on that please?

BCH/BTC

Ohh Okay, perfect thank you for the picture. Thats very interesting

Yes, but I only extend the confirmed lines. For example, draw a line connecting the three ascending peaks and extend up. This will be future resistance, and then support.