Using Higher Time Frame charts 'reversal' indication, the whales could precisely sell at the ultimate assured high by means of reversal indication.
Explained in chart with simple observations.
The highest chart indication is always to be respected until it meets with challenge to then use slightly more current data until situation is best understood and can act accordingly.
People could not have thought of 20,000 as resistance because there was no historical data on it being resistance, but the weekly data hinted on it.
I did not call on it before as I was unaware of the potential