BTC expansion magnitude and retracement ratio (Where are we now?

BTC is expanding and retracing by some degree of magnitude.
So I compared to the last wave of impulse.
You will see how the two waves and ratios looks so (almost identical)
What confused me, is BTC expands in full if we follow the the wave referred yet it looks similar just the first small correction move.
Either way, I suggest to look how Alts move closely.
Thank you for reading my view.